Glossary of Definitions

A living reference of every term defined across the PropLedger research library. Each entry links to the papers that use it; entries are regenerated weekly from the published papers so the glossary can never drift from the library. Diagrams are drawn programmatically from the definition, not by a model.

575 terms across 181 papers.

Contents

• Start Here
• Stocks
• Futures
• Commodities
• Prediction Markets
• Quantitative
• Order Flow & Structure
• Price Action (ICT / SMC)
• Indicators

Start Here

Adverse selection: The cost to a market maker from trading with informed counterparties who possess non-public information or superior price predictions. Used in: Market Makers: Liquidity, Compensation, and the Bid-Ask Spread, Trading the Economic Release Reaction, Institutional Order Handling and the "Smart Money" Premise: What Exchange Rules and Research Actually Show, Market Makers: Liquidity Providers and the Bid-Ask Spread, Why Prediction Market Prices Move Before News Breaks, Smart Money and Market Microstructure: Exchange Rules, Evidence, and Retail Narrative, Initiative and Responsive Activity: Information Asymmetry at the Extremes

Amygdala hijack: A state in which the brain's threat-detection center (amygdala) overrides rational analysis in the prefrontal cortex, triggering fight-or-flight responses inappropriate for trading decisions. Used in: How Revenge Trading and Tilt Destroy Funded Accounts

Ask: The price at which a market maker will sell to a trader. Used in: Market Makers: Liquidity, Compensation, and the Bid-Ask Spread

Average Loss: The mean loss of all unprofitable trades, expressed as a positive magnitude or a negative number, including commissions and slippage. Used in: Expectancy: The One Formula That Connects Win Rate, Payoff and Costs, Expectancy: Connecting Win Rate, Payoff, and Costs

Average Win: The mean profit of all profitable trades, measured from entry to exit and including commissions and slippage. Used in: Expectancy: The One Formula That Connects Win Rate, Payoff and Costs, Expectancy: Connecting Win Rate, Payoff, and Costs

Backtest: Simulation of a strategy against historical price data, typically used before live deployment or paper testing. Used in: Paper Trading: What It Can Prove and What It Cannot, Killzone Time Filtering: Session-Based Entry Restriction in Mechanical Trading, Backtesting and the Three Systematic Biases, Quant Core, Human Gate: An AI Investor-Committee for Daily Stock Plans

Backtesting: The process of applying a trading strategy to historical price data to evaluate its theoretical profitability and risk characteristics before trading with real capital. Used in: Choosing a Trading Style: A Decision Framework for Beginners

Bid: The price at which a market maker will buy from a trader. Used in: Market Makers: Liquidity, Compensation, and the Bid-Ask Spread

Bid-ask spread: The difference between the ask and bid prices; the primary revenue source for market makers and compensation for providing liquidity. Used in: Market Makers: Liquidity, Compensation, and the Bid-Ask Spread, Trading the Economic Release Reaction, Killzones and Session Timing: When Volume Actually Arrives, Prediction Market Prices as Probability Estimators: Theory and Breakdown Points, Market Makers: Liquidity Providers and the Bid-Ask Spread, Futures Contract Expiry Week Reversion, Transaction-Cost Modelling: Slippage, Spread and Impact Assumptions that Decide Whether a Backtest Survives, Paper Trading: What It Can Prove and What It Cannot, Liquidity in Prediction Markets: Depth, Spreads, and Why Small Markets Are Hard to Trade, Market Orders vs. Limit Orders: Why Your Order Type Matters More Than You Think, Why Micro Contracts Are Essential for Prop Traders: Execution Costs, Position Sizing, and Compliance, Why Futures Trading Hours Matter for Prop Traders: RTH vs Overnight Liquidity

Bracket Order: A three-legged order comprising an entry order, profit target, and stop-loss placed simultaneously; automatic cancellation of one exit order upon the other's execution. Used in: Bracket Orders and OCO: The Foundation of Automated Trade Management

Daily loss limit: A mechanical rule that terminates or freezes trading activity when cumulative losses on a single day reach a specified percentage of account value, commonly 4-5% for prop firm accounts. Used in: How Revenge Trading and Tilt Destroy Funded Accounts, Account Resets vs. New Evaluations: The Economics of Retry vs. Walk Away, Consistency Rules at Different Prop Firms: Why the Math Matters More Than You Think, Why Risk Per Trade Matters More Than Win Rate: The Math Behind Prop Firm Failures

Data snooping: The practice of testing many hypotheses or parameter combinations on historical data and reporting only those with strong statistical significance, inflating the likelihood of finding false positives. Used in: Reading Academic Finance Papers as a Trader: A Framework for Evaluating Research Credibility, Reading Academic Finance Research as a Practitioner: Extracting Actionable Insight from Published Studies

Drawdown: The peak-to-trough decline in account equity during a period, expressed as a percentage or dollar amount. Used in: Expectancy: The One Formula That Connects Win Rate, Payoff and Costs, Risk of Ruin: The Arithmetic Every Sized Position Obeys, Choosing a Trading Style: A Decision Framework, Seasonality Heat Strip, Paper Trading: What It Can Prove and What It Cannot, Expectancy: Connecting Win Rate, Payoff, and Costs, Backtesting and the Three Systematic Biases, Position Sizing: Fixed Fractional, Kelly Criterion, and Why Full Kelly Hurts, Choosing a Trading Style: A Decision Framework for Beginners, Win Rate vs. Risk-Reward: The Math That Kills Most Funded Traders, How Revenge Trading and Tilt Destroy Funded Accounts, Why Micro Contracts Are Essential for Prop Traders: Execution Costs, Position Sizing, and Compliance, Account Resets vs. New Evaluations: The Economics of Retry vs. Walk Away, Consistency Rules at Different Prop Firms: Why the Math Matters More Than You Think, Why Futures Trading Hours Matter for Prop Traders: RTH vs Overnight Liquidity, The Kelly Criterion vs. Fixed Risk: Which Sizing Method Works for Prop Traders

Drawdown Limit: The maximum cumulative loss permitted on an account within a defined period; commonly enforced on proprietary trading accounts. Used in: Bracket Orders and OCO: The Foundation of Automated Trade Management, Notional Value vs. Margin: Why Margin Alone Blinds Prop Traders to Real Risk, Tick Size and Tick Value: The Foundation of Position Sizing

Edge: A systematic advantage that produces positive expected value over a defined period, typically verified through backtesting or mathematical proof rather than subjective confidence. Used in: Choosing a Trading Style: A Decision Framework for Beginners

Expectancy: The average profit or loss per trade, calculated as (Win Probability × Average Win) + (Loss Probability × Average Loss) − Trading Costs per Trade. Used in: Expectancy: The One Formula That Connects Win Rate, Payoff and Costs, Expectancy: Connecting Win Rate, Payoff, and Costs

Expected Value: A statistical concept representing the long-run average outcome of a probabilistic event, equal to the sum of each outcome weighted by its probability. Used in: Expectancy: The One Formula That Connects Win Rate, Payoff and Costs

Fixed risk: A position sizing method that risks a constant dollar amount or percentage of the account on every trade, regardless of market conditions or recent performance. Used in: The Kelly Criterion vs. Fixed Risk: Which Sizing Method Works for Prop Traders

Immediacy: The service of allowing a trader to execute a transaction instantly at posted prices rather than waiting for a match with another trader. Used in: Market Makers: Liquidity, Compensation, and the Bid-Ask Spread, Market Makers: Liquidity Providers and the Bid-Ask Spread

Intraday Margin: The maximum leverage available to traders during the trading day, typically 4:1 for equities and higher for futures, that must be reduced to the overnight margin requirement before market close. Used in: Choosing a Trading Style: A Decision Framework, Tick Size and Tick Value: The Foundation of Position Sizing

Inventory risk: The cost borne by a market maker from holding securities while waiting to resell them, due to the possibility that prices move unfavorably. Used in: Market Makers: Liquidity, Compensation, and the Bid-Ask Spread, Market Makers: Liquidity Providers and the Bid-Ask Spread

Kelly Criterion: The mathematical fraction of capital that, when wagered per bet in repeated trials with fixed odds, maximizes long-run logarithmic wealth growth; betting above this amount increases ruin risk. Used in: Risk of Ruin: The Arithmetic Every Sized Position Obeys, Position Sizing: Fixed Fractional, Kelly Criterion, and Why Full Kelly Hurts, A Committee of Agents for Prediction-Market Trading: Design of a Paper-Only Kalshi System, The Kelly Criterion vs. Fixed Risk: Which Sizing Method Works for Prop Traders

Liquidity: The ability to buy or sell a large quantity of a security quickly without substantially moving its price. Used in: Market Makers: Liquidity, Compensation, and the Bid-Ask Spread, Futures Contract Roll and Expiry Week Shading, Market Makers: Liquidity Providers and the Bid-Ask Spread, Liquidity in Prediction Markets: Depth, Spreads, and Why Small Markets Are Hard to Trade, Why Micro Contracts Are Essential for Prop Traders: Execution Costs, Position Sizing, and Compliance, Why Futures Trading Hours Matter for Prop Traders: RTH vs Overnight Liquidity

Look-ahead bias: The error of using information in a backtest that would not have been available to a trader at the time of trading, such as announced earnings data before the announcement date. Used in: Reading Academic Finance Papers as a Trader: A Framework for Evaluating Research Credibility, Reading Academic Finance Research as a Practitioner: Extracting Actionable Insight from Published Studies, RSI Divergence: Mechanical Definition and Null-Hypothesis Testing

Loss aversion: The tendency for losses to feel approximately twice as psychologically painful as equivalent gains, leading to irrational decision-making to avoid further losses. Used in: How Revenge Trading and Tilt Destroy Funded Accounts

Margin: The collateral required by a broker to hold a futures contract position. It is distinct from position sizing, which determines how much exposure should be held. Used in: The Kelly Criterion vs. Fixed Risk: Which Sizing Method Works for Prop Traders

Multi-bracket Order: An order structure placing multiple profit targets and stop-loss levels simultaneously to enable position scaling across different price points. Used in: Bracket Orders and OCO: The Foundation of Automated Trade Management

OCO Order: A pair of linked exit orders (typically profit target and stop-loss) where execution of either automatically cancels the other. Used in: Bracket Orders and OCO: The Foundation of Automated Trade Management

Paper trading: Simulation of a trading strategy using hypothetical capital and recorded or live price data, without committing real money or executing actual orders. Used in: Paper Trading: What It Can Prove and What It Cannot, A Committee of Agents for Prediction-Market Trading: Design of a Paper-Only Kalshi System

Parameter optimization: The process of selecting model parameters by testing multiple values on historical data; if not validated on hold-out or future data, optimized parameters tend to overfit and perform worse out-of-sample. Used in: Reading Academic Finance Papers as a Trader: A Framework for Evaluating Research Credibility

Pattern Day Trader: A trader who executes four or more day trades within five business days in an account at a broker subject to SEC/FINRA rules, triggering a minimum $25,000 equity requirement. Used in: Choosing a Trading Style: A Decision Framework

Pattern day trader rule: Regulation from the U.S. Financial Industry Regulatory Authority (FINRA) requiring a minimum of $25,000 account equity to buy and sell the same security more than three times within a rolling 5-business-day period. Used in: Choosing a Trading Style: A Decision Framework for Beginners

Payoff ratio: The ratio of the average winning trade size to the average losing trade size; a 1.5 payoff ratio means winning trades average 50% larger than losing trades. Used in: Risk of Ruin: The Arithmetic Every Sized Position Obeys, The Kelly Criterion vs. Fixed Risk: Which Sizing Method Works for Prop Traders

Position size: The dollar amount or fraction of account capital risked on a single trade; typically expressed as a percentage of total capital or as a fixed dollar amount. Used in: Risk of Ruin: The Arithmetic Every Sized Position Obeys, Position Sizing: Fixed Fractional, Kelly Criterion, and Why Full Kelly Hurts

Position Trading: A trading style in which positions are held for weeks to months or longer, often based on fundamental or macroeconomic analysis, with the goal of capturing large multi-week or multi-month moves. Used in: Choosing a Trading Style: A Decision Framework

Prospect theory: A descriptive theory of decision-making under risk developed by Daniel Kahneman and Amos Tversky, showing that people weight losses more heavily than gains and often make irrational choices to avoid losses. Used in: How Revenge Trading and Tilt Destroy Funded Accounts

Regular Trading Hours (RTH): For U.S. Equity index futures, the period from 9:30 AM to 4:00 PM ET when institutional volume and liquidity are highest. Used in: Market Orders vs. Limit Orders: Why Your Order Type Matters More Than You Think, Why Futures Trading Hours Matter for Prop Traders: RTH vs Overnight Liquidity

Revenge trading: Trading to recover losses through increased position sizes or rule violations driven by emotional distress rather than a planned strategy. Used in: How Revenge Trading and Tilt Destroy Funded Accounts, Why Risk Per Trade Matters More Than Win Rate: The Math Behind Prop Firm Failures

Risk of ruin: The mathematical probability that a trading account will be depleted to zero or below through successive losses, given a fixed position size, win rate, and payoff ratio. Used in: Risk of Ruin: The Arithmetic Every Sized Position Obeys, The Kelly Criterion vs. Fixed Risk: Which Sizing Method Works for Prop Traders

Scalping: A trading style in which positions are held for seconds to minutes, with profit targets typically of 1-5 ticks or points per trade, relying on high frequency and leverage. Used in: Choosing a Trading Style: A Decision Framework, Choosing a Trading Style: A Decision Framework for Beginners, Why Micro Contracts Are Essential for Prop Traders: Execution Costs, Position Sizing, and Compliance

Survivorship bias: The distortion arising when a historical dataset includes only securities or funds that survived the entire period, excluding those that failed or delisted, causing average returns to be overstated. Used in: Reading Academic Finance Papers as a Trader: A Framework for Evaluating Research Credibility, Reading Academic Finance Research as a Practitioner: Extracting Actionable Insight from Published Studies, Backtesting and the Three Systematic Biases, Auditing Your Own Edge: Results From a Cross-Asset Backtesting Program

Swing Trading: A trading style in which positions are held for several days to several weeks, typically 5-20 trading days, capturing overnight and multi-day price moves. Used in: Choosing a Trading Style: A Decision Framework, Choosing a Trading Style: A Decision Framework for Beginners

Tick: The minimum price increment by which a futures contract can move, set by the exchange and fixed for each contract type. Used in: Tick Size and Tick Value: The Foundation of Position Sizing

Tilt: An emotional state in which frustration or loss aversion causes a trader to deviate from their trading plan, potentially including revenge trading but also overconfidence or FOMO. Used in: How Revenge Trading and Tilt Destroy Funded Accounts

Trading Costs: Commissions, exchange fees, and bid-ask slippage incurred on each trade. Used in: Expectancy: The One Formula That Connects Win Rate, Payoff and Costs

Transaction costs: The aggregate of commissions, bid-ask spreads, fees, and market impact incurred when entering and exiting a position. Used in: Reading Academic Finance Papers as a Trader: A Framework for Evaluating Research Credibility, Reading Academic Finance Research as a Practitioner: Extracting Actionable Insight from Published Studies, Choosing a Trading Style: A Decision Framework, Transaction-Cost Modelling: Slippage, Spread and Impact Assumptions that Decide Whether a Backtest Survives, Expectancy: Connecting Win Rate, Payoff, and Costs

Win Probability: The fraction of trades that close with a profit, expressed as a decimal between 0 and 1. Used in: Expectancy: The One Formula That Connects Win Rate, Payoff and Costs

Stocks

Abnormal Return: The return realized on a security in excess of the return predicted by a risk model or benchmark. It isolates the effect of a specific event, such as an earnings announcement, after adjusting for systematic risk exposures. Used in: Post-Earnings Announcement Drift: Forty Years of Evidence and the Current Debate

After-Hours Trading: Trading activity on electronic communication networks occurring between 4 p.m. And 8 p.m. Eastern Time after the primary exchanges close. Used in: How Earnings Announcements Move Stock Prices Overnight, Equity Session Ranges: Overnight vs Regular Hours

Allocation drift: The unintended shift in a portfolio's asset weights caused by differential performance among holdings over time. Drift occurs when one asset class outperforms or underperforms, changing its proportion of the total portfolio. Used in: Market Cycles Within Cycles: Why Portfolio Rebalancing Traps Long-Term Investors Into Selling Cheap

Alpha decay: The decline in excess returns following academic publication or widespread investor adoption of a trading signal, as market participants arbitrage away the anomaly. Used in: Why Factor Performance Decays: Understanding Alpha Decay and Crowding in Long-Term Investing

Alternative trading system (ATS): A trading venue operated by a securities firm or other entity that does not operate as a national securities exchange but facilitates order matching under Regulation ATS. Used in: Dark Pools: What They Are and What They Are Not

Behavioral finance: The study of how psychological factors, emotions, and cognitive biases influence investment decisions and market outcomes. Used in: Dollar-Cost Averaging vs. Lump-Sum Investing: The Data and When Each Works

Borrow Fee: The annualized percentage rate charged to a short seller for the right to borrow and hold shares from a lending pool, typically ranging from 0.25% to 3%+ depending on share availability. Used in: Short Interest, Borrow Fees, and Short Squeezes

Buy-In: Forced closure of a short position by a broker when shares cannot be borrowed or margin is exhausted; the broker purchases shares at market price to close the short. Used in: Short Interest, Borrow Fees, and Short Squeezes

Calendar-based rebalancing: A rebalancing approach that adjusts portfolio allocations at fixed time intervals such as monthly, quarterly, or annually, regardless of market conditions or valuation levels. This method may trigger sales at unfavourable valuations. Used in: Market Cycles Within Cycles: Why Portfolio Rebalancing Traps Long-Term Investors Into Selling Cheap

Capital allocation: The process by which a company deploys its earnings and cash reserves across investments, dividends, debt repayment, and share buybacks. Used in: Retention Ratio and ROE: Why Earnings Reinvestment Unlocks Long-Term Stock Growth

Compounding: The process by which investment returns generate their own returns over time, with gains remaining invested to contribute to future growth. Used in: Retention Ratio and ROE: Why Earnings Reinvestment Unlocks Long-Term Stock Growth, Dividend Growth vs. Dividend Yield: Why Long-Term Investors Pick the Wrong Metric

Concentration: A portfolio strategy focused on a limited number of positions (typically 5-10 stocks), where each holding carries meaningful weight and individual company performance significantly impacts overall returns. Used in: The Diversification Threshold: Why 20-30 Stocks Are Enough (And More Isn't)

Consensus Estimate: The average earnings per share forecast compiled by sell-side analysts covering a stock, published by data providers such as I/B/E/S and FactSet. Used in: How Earnings Announcements Move Stock Prices Overnight

Convergent factor: A factor anchored to fundamentals and subject to negative feedback loops, such that crowding reinforces rather than undermines the underlying signal (example: value). Used in: Why Factor Performance Decays: Understanding Alpha Decay and Crowding in Long-Term Investing

Dark pool: An alternative trading system under SEC Regulation ATS that executes orders without publishing the order book in real time, though trades must be reported post-execution. Used in: Dark Pools: What They Are and What They Are Not, Smart Money and Market Microstructure: Exchange Rules, Evidence, and Retail Narrative

Diminishing returns: The principle that beyond approximately 20-30 stocks from different industries, additional holdings provide negligible reduction in portfolio risk. Used in: The Diversification Threshold: Why 20-30 Stocks Are Enough (And More Isn't)

Divergent factor: A factor that lacks fundamental anchors and is subject to positive feedback loops, such that crowding amplifies price movements and eventual reversals (example: momentum). Used in: Why Factor Performance Decays: Understanding Alpha Decay and Crowding in Long-Term Investing

Diversification: The practice of spreading capital across multiple securities with independent or low-correlated risk drivers to reduce portfolio volatility without sacrificing expected returns. Used in: The Diversification Threshold: Why 20-30 Stocks Are Enough (And More Isn't)

Dividend growth: The year-over-year increase in the per-share dividend payment made by a company to shareholders. Used in: Dividend Growth vs. Dividend Yield: Why Long-Term Investors Pick the Wrong Metric

Dividend payout ratio: The percentage of a company's net income distributed to shareholders as cash dividends. Used in: Earnings Yield vs. Earnings Power: How Retention Ratio Reveals Which Cheap Stocks Actually Reinvest for Growth

Dividend reinvestment: The automatic use of dividend payments to purchase additional shares of the same security rather than receiving cash. Used in: Dividend Growth vs. Dividend Yield: Why Long-Term Investors Pick the Wrong Metric

Dividend yield: Annual cash dividends per share divided by share price; the percentage of annual dividend income relative to the stock price. Used in: Earnings Yield vs. Earnings Power: How Retention Ratio Reveals Which Cheap Stocks Actually Reinvest for Growth, Retention Ratio and ROE: Why Earnings Reinvestment Unlocks Long-Term Stock Growth, Dividend Growth vs. Dividend Yield: Why Long-Term Investors Pick the Wrong Metric

Dollar-cost averaging (DCA): A strategy of investing a fixed amount of money at regular intervals regardless of asset price, intended to reduce the impact of price volatility on the average cost per unit. Used in: Dollar-Cost Averaging vs. Lump-Sum Investing: The Data and When Each Works

Earnings Per Share (EPS): Net income divided by the number of outstanding shares, reported by a company on earnings release and compared against analyst consensus. Used in: How Earnings Announcements Move Stock Prices Overnight, Post-Earnings Announcement Drift: Forty Years of Evidence and the Current Debate

Earnings Surprise: The difference between reported earnings per share and the consensus forecast, often expressed as a percentage or as a difference in cents per share. Used in: How Earnings Announcements Move Stock Prices Overnight, Post-Earnings Announcement Drift: Forty Years of Evidence and the Current Debate

Earnings yield: Annual earnings per share divided by share price; the inverse of the price-to-earnings ratio, expressed as a percentage. Used in: Earnings Yield vs. Earnings Power: How Retention Ratio Reveals Which Cheap Stocks Actually Reinvest for Growth

Efficient Market Hypothesis (EMH): The proposition that security prices instantaneously reflect all available information, making it impossible to achieve consistently abnormal returns using trading rules based on that information. The strong form assumes immediate incorporation of all available data. Used in: Post-Earnings Announcement Drift: Forty Years of Evidence and the Current Debate

Event Study: An empirical method that measures the effect of a specific event on a security's return by comparing returns in the event window to a control period while adjusting for systematic risk and other confounding factors. Used in: Post-Earnings Announcement Drift: Forty Years of Evidence and the Current Debate

Exchange-traded fund (ETF): A pooled investment vehicle traded on exchanges that holds a basket of securities and tracks an underlying index, commodity, or asset class. Used in: Dollar-Cost Averaging vs. Lump-Sum Investing: The Data and When Each Works

Factor crowding: The erosion of factor returns as increasing capital competes for the same profitable signal, dividing available alpha among more participants according to a fixed alpha capacity. Used in: Why Factor Performance Decays: Understanding Alpha Decay and Crowding in Long-Term Investing

Factor investing: An investment approach that targets quantifiable characteristics (such as size, value, or momentum) that explain differences in security returns across a portfolio. Used in: Why Factor Performance Decays: Understanding Alpha Decay and Crowding in Long-Term Investing

Factor premium: The excess return earned by securities exhibiting a particular factor characteristic, measured relative to the broad market over a defined period. Used in: Why Factor Performance Decays: Understanding Alpha Decay and Crowding in Long-Term Investing

Float: The number of shares outstanding and available for trading, excluding shares held in treasury or by founder/insider lock-ups. Used in: Short Interest, Borrow Fees, and Short Squeezes

Gap: A price discontinuity at market open, where the opening price differs materially from the previous session's close. Used in: How Earnings Announcements Move Stock Prices Overnight, Prior Day High, Low, and Settlement, Equity Session Ranges: Overnight vs Regular Hours, Gap Fill Probability: Why Most Gaps Don't Fill the Day They Open

Implied Volatility: The market's expectation of future price volatility embedded in options prices; used by traders as a proxy for expected price move magnitude. Used in: How Earnings Announcements Move Stock Prices Overnight, Volatility and the VIX: What the Index Measures and What It Does Not, Bollinger Band Squeeze Meter

Index effect: The temporary price movement or excess volatility observed in a security on or near its addition to or removal from a widely tracked index. Used in: Index Rebalancing and Predictable Order Flow

Index rebalancing: The adjustment of a fund's portfolio to maintain alignment with its benchmark index after changes in index composition or weightings. Used in: Index Rebalancing and Predictable Order Flow

Index reconstitution: A change in an index's membership, typically driven by rules based on market capitalization, liquidity, or sector criteria. Used in: Index Rebalancing and Predictable Order Flow

Judgment factor: A factor requiring subjective interpretation of the underlying signal (such as value, where 'cheapness' admits multiple definitions), creating persistent disagreement and higher barriers to crowding. Used in: Why Factor Performance Decays: Understanding Alpha Decay and Crowding in Long-Term Investing

Locate: The broker's confirmation that shares are available to borrow before a short sale is executed; required under SEC Regulation SHO. Used in: Short Interest, Borrow Fees, and Short Squeezes

Lump-sum investing: Deploying an entire sum of capital into markets in a single transaction rather than over multiple periods. Used in: Dollar-Cost Averaging vs. Lump-Sum Investing: The Data and When Each Works

Margin Call: A demand from a broker that a trader deposit additional capital or close positions because the value of collateral has fallen below the maintenance threshold. Used in: Short Interest, Borrow Fees, and Short Squeezes

Margin of safety: A discount to intrinsic value or historical average valuation that provides a cushion against being wrong about future returns. A wide valuation gap between asset classes establishes a margin of safety for the cheaper segment. Used in: Market Cycles Within Cycles: Why Portfolio Rebalancing Traps Long-Term Investors Into Selling Cheap

Market impact: The change in market price that results from a trader's order being executed or becoming known to other market participants. Used in: Dark Pools: What They Are and What They Are Not, Transaction-Cost Modelling: Slippage, Spread and Impact Assumptions that Decide Whether a Backtest Survives, Paper Trading: What It Can Prove and What It Cannot, Market Orders vs. Limit Orders: Why Your Order Type Matters More Than You Think

Mechanical factor: A factor with an unambiguous, easily replicated signal (such as momentum based on past price performance) that is quick to arbitrage once identified and therefore prone to rapid crowding. Used in: Why Factor Performance Decays: Understanding Alpha Decay and Crowding in Long-Term Investing

Order protection: The rule that an ATS must execute orders at no worse price than the national best bid or offer on displayed exchanges at the time of execution. Used in: Dark Pools: What They Are and What They Are Not

Out-of-the-money options: Call options with strike prices above the current underlying price, or put options with strike prices below; they have no intrinsic value and are sensitive to tail risk pricing. Used in: Volatility and the VIX: What the Index Measures and What It Does Not

Passive fund: An investment vehicle designed to replicate the holdings of a published benchmark index, aiming to match index returns subject to tracking error. Used in: Index Rebalancing and Predictable Order Flow

Payout ratio: The percentage of a company's earnings distributed to shareholders as dividends; lower ratios typically indicate room for future dividend increases. Used in: Dividend Growth vs. Dividend Yield: Why Long-Term Investors Pick the Wrong Metric

Post-Earnings Announcement Drift (PEAD): The tendency for a stock's price to continue moving in the direction implied by an earnings surprise in the days and weeks following the public announcement of reported earnings. This pattern persists despite the information being public and measurable as abnormal returns. Used in: Post-Earnings Announcement Drift: Forty Years of Evidence and the Current Debate

Post-trade transparency: The public reporting of executed trades (price and volume) shortly after execution. Used in: Dark Pools: What They Are and What They Are Not

Pre-Market Trading: Trading activity on electronic communication networks occurring between 4 a.m. And 9:30 a.m. Eastern Time before official market open. Used in: How Earnings Announcements Move Stock Prices Overnight

Pre-trade transparency: The public display of buy and sell orders (and their sizes) before execution. Used in: Dark Pools: What They Are and What They Are Not

Regret risk: The psychological discomfort of observing an alternative investment outcome that would have been superior, which may motivate emotional decision-making. Used in: Dollar-Cost Averaging vs. Lump-Sum Investing: The Data and When Each Works

Regulation ATS: SEC rule 300 of Regulation M.II, which establishes requirements for alternative trading systems, including order protection, surveillance, fair access, and disclosure obligations. Used in: Dark Pools: What They Are and What They Are Not

Retention ratio: The percentage of net income retained by a company and reinvested in the business rather than paid out as dividends; equal to one minus the dividend payout ratio. Used in: Earnings Yield vs. Earnings Power: How Retention Ratio Reveals Which Cheap Stocks Actually Reinvest for Growth, Retention Ratio and ROE: Why Earnings Reinvestment Unlocks Long-Term Stock Growth

Return on Equity (ROE): Net income divided by shareholders' equity; a measure of how efficiently a company generates profit from invested capital. Used in: Earnings Yield vs. Earnings Power: How Retention Ratio Reveals Which Cheap Stocks Actually Reinvest for Growth, Retention Ratio and ROE: Why Earnings Reinvestment Unlocks Long-Term Stock Growth

Short Interest: The aggregate number of shares of a security that have been sold short and not yet closed, reported twice monthly by FINRA. Used in: Short Interest, Borrow Fees, and Short Squeezes

Short Squeeze: A self-reinforcing cycle in which rising prices force short sellers to cover positions, generating additional buying pressure that can accelerate price movement until supply increases, price stabilizes, or trading is halted. Used in: Short Interest, Borrow Fees, and Short Squeezes

Small-cap premium: The historical tendency of small-capitalization stocks to deliver approximately 2 percentage points per year higher average returns than large-capitalization stocks over long periods. This outperformance clusters in multi-year rotations rather than occurring evenly each year. Used in: Market Cycles Within Cycles: Why Portfolio Rebalancing Traps Long-Term Investors Into Selling Cheap

Sustainable growth rate: The maximum rate at which a company can expand using only internally generated cash flow without raising new debt or equity, calculated as Retention Ratio × ROE. Used in: Retention Ratio and ROE: Why Earnings Reinvestment Unlocks Long-Term Stock Growth

Sustainable Growth Rate (SGR): The maximum rate at which a company can grow using internally generated earnings without raising external capital; calculated as retention ratio multiplied by return on equity. Used in: Earnings Yield vs. Earnings Power: How Retention Ratio Reveals Which Cheap Stocks Actually Reinvest for Growth

Systematic risk: Risk that affects all stocks to varying degrees and cannot be eliminated through diversification; includes macroeconomic factors such as recessions, interest rate changes, and broad market sentiment. Used in: The Diversification Threshold: Why 20-30 Stocks Are Enough (And More Isn't)

Threshold-based rebalancing: A rebalancing approach that triggers trades only when an asset class drifts beyond a predetermined percentage band (such as ±5-10%) from its target allocation, rather than on a fixed schedule. This method avoids mechanical selling when valuations are compressed. Used in: Market Cycles Within Cycles: Why Portfolio Rebalancing Traps Long-Term Investors Into Selling Cheap

Timing risk: The possibility that capital deployment occurs at an unfavorable point in a market cycle, resulting in suboptimal entry prices or immediate losses. Used in: Dollar-Cost Averaging vs. Lump-Sum Investing: The Data and When Each Works

Total return: The sum of capital appreciation and dividend income from an investment. Used in: Dividend Growth vs. Dividend Yield: Why Long-Term Investors Pick the Wrong Metric

Tracking error: The standard deviation of returns between a portfolio and its benchmark index, arising from transaction costs, fees, and imperfect replication. Used in: Index Rebalancing and Predictable Order Flow

Underreaction: In behavioral finance, the tendency for investors to adjust prices or beliefs by less than the information-theoretic response to new data, implying subsequent price movement in the same direction as the initial adjustment. Used in: Post-Earnings Announcement Drift: Forty Years of Evidence and the Current Debate

Unsystematic risk: Company-specific risk tied to individual business outcomes such as product failures, management changes, or litigation; can be eliminated through diversification and does not generate a return premium in equilibrium. Used in: The Diversification Threshold: Why 20-30 Stocks Are Enough (And More Isn't)

Valuation gap: The difference in price-to-earnings ratios or other valuation metrics between two asset classes, used to measure relative cheapness or expensiveness. When the gap widens to historical extremes, it establishes a margin of safety for the cheaper asset class. Used in: Market Cycles Within Cycles: Why Portfolio Rebalancing Traps Long-Term Investors Into Selling Cheap

Variance swap: A hypothetical derivative contract in which one counterparty pays a fixed volatility strike and receives realized volatility; option markets price this exposure implicitly through call and put premiums. Used in: Volatility and the VIX: What the Index Measures and What It Does Not

Volatility risk premium: The tendency for implied volatility to exceed realized volatility on average, benefiting sellers of options over the long term. Used in: Volatility and the VIX: What the Index Measures and What It Does Not

Yield on cost: The annual dividend per share divided by the original purchase price paid for the stock, expressed as a percentage; typically increases over time as dividends grow while the purchase price remains fixed. Used in: Dividend Growth vs. Dividend Yield: Why Long-Term Investors Pick the Wrong Metric

Futures

ACH (Automated Clearing House): A domestic US bank transfer system that typically settles in 1-3 business days. It is slower than same-day methods but more accessible than wire transfers. Used in: Why Your Profit Split Isn't Your Real Payout: The Hidden Math Between 100% and What You Actually Withdraw

Consistency requirement: A rule on funded accounts stipulating minimum activity levels or trading patterns that must be maintained to keep the account active and eligible for payouts. Used in: Account Resets vs. New Evaluations: The Economics of Retry vs. Walk Away

Consistency rule: A risk management requirement that limits the percentage of total trading profit that can come from a single trading day, typically enforced at 20-50% depending on the firm and account stage. Used in: Consistency Rules at Different Prop Firms: Why the Math Matters More Than You Think

Contract multiplier: The factor that converts a quoted price into a dollar P&L; for the E-mini S&P 500, a 1-point index move equals $50 gain or loss per contract. Used in: E-Mini and Micro Futures Contracts: Purpose and Mechanics, Notional Value vs. Margin: Why Margin Alone Blinds Prop Traders to Real Risk

Eligibility window: The minimum period or condition a trader must satisfy before becoming permitted to request a payout. Examples include 5 qualifying trading days or a calendar cycle. Used in: Why Your Profit Split Isn't Your Real Payout: The Hidden Math Between 100% and What You Actually Withdraw

End of day (EOD) trailing drawdown: A drawdown calculation that updates once per trading session based on closed balance, leaving intraday unrealized profit changes untracked. Used in: End of Day vs Intraday Trailing Drawdown: What Funded Traders Need to Know

End-of-day balance: The closing account equity at the end of a trading session; some prop firms use this as the reference point for trailing drawdown instead of intraday peak. Used in: Trailing Drawdown, Explained: Why a 25K Apex Is Not a 100K Apex

Equity Drawdown: The peak-to-trough decline in account value from the highest point to the lowest point, measured as an absolute amount or percentage. Used in: Why Risk Per Trade Matters More Than Win Rate: The Math Behind Prop Firm Failures

Evaluation account: A simulated trading account with fixed rules and performance thresholds that a trader must pass before gaining access to a funded account. Evaluation accounts have no consistency requirement and allow resets upon rule breach. Used in: Account Resets vs. New Evaluations: The Economics of Retry vs. Walk Away

Evaluation phase: The initial challenge period during which a trader must demonstrate profitability and adherence to all rules before gaining access to a funded trading account. Used in: Consistency Rules at Different Prop Firms: Why the Math Matters More Than You Think

Fill-or-Kill (FOK): A time-in-force option requiring immediate all-or-nothing execution; any shortfall results in immediate cancellation of the entire order. Used in: CME Globex Order Types for Futures Traders, CME Globex Order Types: A Mechanical Overview

Funded account: A live trading account where the firm provides actual capital for the trader to trade with, subject to stricter rules and consistency requirements than evaluation accounts. Failed funded accounts cannot be reset and require a new evaluation purchase. Used in: Account Resets vs. New Evaluations: The Economics of Retry vs. Walk Away, Consistency Rules at Different Prop Firms: Why the Math Matters More Than You Think

Gap risk: The exposure to price discontinuity when a market reopens after a close, such as Sunday evening or following weekend news, where the opening price differs substantially from the prior close with no opportunity to exit at intermediate prices. Used in: Why Futures Trading Hours Matter for Prop Traders: RTH vs Overnight Liquidity

Globex session: The overnight electronic trading session on CME that runs Sunday through Thursday from 5:00 PM to 8:30 AM CT, characterized by lower volume and wider spreads than regular trading hours. Used in: Why Futures Trading Hours Matter for Prop Traders: RTH vs Overnight Liquidity

Good-Till-Cancelled (GTC): A time-in-force option under which an order remains active until explicitly cancelled or filled, persisting across multiple trading sessions within the contract month. Used in: CME Globex Order Types for Futures Traders, CME Globex Order Types: A Mechanical Overview

High-water mark: The highest account balance or equity value reached during a trading period; a trailing drawdown is set as a fixed distance below this mark. Used in: End of Day vs Intraday Trailing Drawdown: What Funded Traders Need to Know

Immediate-or-Cancel (IOC): A time-in-force instruction that executes immediately against available liquidity and automatically cancels any unfilled portion. Used in: CME Globex Order Types: A Mechanical Overview

Initial margin: The cash deposit required to open a new futures position; varies by contract size and volatility, set by the exchange clearing house. Used in: E-Mini and Micro Futures Contracts: Purpose and Mechanics, Tick Size and Tick Value: The Foundation of Position Sizing

Intraday peak: The highest account equity value reached during a single trading day, including unrealized profits on open positions; used by most prop firms as the reference point for trailing drawdown calculations. Used in: Trailing Drawdown, Explained: Why a 25K Apex Is Not a 100K Apex

Intraday trailing drawdown: A drawdown calculation that updates continuously in real time, typically tracking open equity including unrealized P&L, so that intraday peaks immediately move the threshold upward. Used in: End of Day vs Intraday Trailing Drawdown: What Funded Traders Need to Know

Limit order: An instruction to buy or sell at a specified price or better; the order rests on the order book and may not fill if the market does not reach that price. Used in: CME Globex Order Types for Futures Traders, CME Globex Order Types: A Mechanical Overview, Market Orders vs. Limit Orders: Why Your Order Type Matters More Than You Think

Liquidation level: The account equity threshold below which the trading account is automatically closed by the prop firm; calculated as the highest equity point minus the trailing drawdown amount. Used in: Trailing Drawdown, Explained: Why a 25K Apex Is Not a 100K Apex

Liquidity spread: The difference between the bid (buy) and ask (sell) prices in the order book; wider spreads increase execution cost. Used in: E-Mini and Micro Futures Contracts: Purpose and Mechanics

Margin requirement: The minimum deposit of capital a trader must maintain with a broker to hold an open futures position. Used in: Notional Value vs. Margin: Why Margin Alone Blinds Prop Traders to Real Risk

Market order: An instruction to buy or sell at the best available price immediately, with no price guarantee but near-certain execution on a liquid contract. Used in: CME Globex Order Types for Futures Traders, CME Globex Order Types: A Mechanical Overview, Market Orders vs. Limit Orders: Why Your Order Type Matters More Than You Think

Micro contract: A futures contract with a notional value one-tenth that of its standard counterpart, maintaining identical price movement but reducing dollar exposure per tick. Used in: Why Micro Contracts Are Essential for Prop Traders: Execution Costs, Position Sizing, and Compliance, Notional Value vs. Margin: Why Margin Alone Blinds Prop Traders to Real Risk

Monte Carlo Simulation: A statistical method that models multiple random outcomes of trading sequences to estimate the probability of reaching a target profit without exceeding drawdown limits. Used in: Why Risk Per Trade Matters More Than Win Rate: The Math Behind Prop Firm Failures

Net profit: Trading gains after deduction of losing trades, commissions, and all fees. It is the figure upon which the profit split percentage is applied. Used in: Why Your Profit Split Isn't Your Real Payout: The Hidden Math Between 100% and What You Actually Withdraw

Notional exposure: The total market value implied by a futures position; calculated as contract multiplier × quoted price × number of contracts. Used in: E-Mini and Micro Futures Contracts: Purpose and Mechanics

Notional value: The total dollar amount of market exposure represented by a futures position, calculated as the contract price multiplied by the contract multiplier and the number of contracts. Used in: Notional Value vs. Margin: Why Margin Alone Blinds Prop Traders to Real Risk

Order book: The electronic record of all active buy and sell limit orders for a contract, ranked by price and timestamp. Used in: CME Globex Order Types for Futures Traders, Transaction-Cost Modelling: Slippage, Spread and Impact Assumptions that Decide Whether a Backtest Survives, Market Orders vs. Limit Orders: Why Your Order Type Matters More Than You Think

Pass rate: The percentage of traders who successfully complete a prop firm evaluation or challenge relative to the total number of participants who attempt it. Used in: Consistency Rules at Different Prop Firms: Why the Math Matters More Than You Think

Position limit: Regulatory or exchange-imposed ceiling on the number of contracts a single trader or trading entity may hold. Used in: E-Mini and Micro Futures Contracts: Purpose and Mechanics, Favorite-Longshot Bias in Prediction Markets, Why Micro Contracts Are Essential for Prop Traders: Execution Costs, Position Sizing, and Compliance

Processing time: The duration between payout request submission and funds arrival in the trader's bank account. Duration varies by transfer method (ACH, wire transfer, cryptocurrency) and firm policy. Used in: Why Your Profit Split Isn't Your Real Payout: The Hidden Math Between 100% and What You Actually Withdraw

Profit split: The percentage of net trading profit a trader retains versus the share retained by the prop firm. Common structures include 80/20, 90/10, or tiered arrangements with higher percentages for initial profit tiers. Used in: Why Your Profit Split Isn't Your Real Payout: The Hidden Math Between 100% and What You Actually Withdraw

Prop firm evaluation: A trial period during which a trader demonstrates trading ability under the firm's rules and profit targets before gaining access to a funded account with real capital. Used in: Trailing Drawdown, Explained: Why a 25K Apex Is Not a 100K Apex

Reset fee: A charge paid to restart a failed evaluation account at its original starting balance while maintaining the original account rules and parameters. Reset fees typically range from $50–$150 for standard account sizes, though some firms have eliminated them. Used in: Account Resets vs. New Evaluations: The Economics of Retry vs. Walk Away

Reset trap: A cycle in which a trader repeatedly pays reset fees while repeating the same trading errors, accumulating costs without addressing the underlying strategy or execution problem. Used in: Account Resets vs. New Evaluations: The Economics of Retry vs. Walk Away

Reward-to-Risk Ratio: The relationship between potential profit on a trade and potential loss, expressed as a ratio (e.g., 2:1 means risking $1 to target $2 in profit). Used in: Why Risk Per Trade Matters More Than Win Rate: The Math Behind Prop Firm Failures

Round trip: A trade that opens, moves into profit, then reverses back through the entry point or lower without closing profitably, potentially breaching a tightened drawdown limit despite no realized session loss. Used in: End of Day vs Intraday Trailing Drawdown: What Funded Traders Need to Know

Safety net: A minimum account balance threshold that must be maintained even after payout approval. It is typically calculated as the trailing drawdown limit plus a fixed buffer amount. Used in: Why Your Profit Split Isn't Your Real Payout: The Hidden Math Between 100% and What You Actually Withdraw

Stop order: A conditional order that becomes active and converts to a market order only when the market touches or passes a specified trigger price. Used in: CME Globex Order Types for Futures Traders, CME Globex Order Types: A Mechanical Overview

Stop-limit order: A conditional order that triggers at a stop price but executes as a limit order, providing price protection at the cost of possible non-execution. Used in: CME Globex Order Types for Futures Traders, CME Globex Order Types: A Mechanical Overview

Tick size: The minimum price increment for a quoted contract; typically smaller for micro contracts than standards to reflect their reduced size. Used in: E-Mini and Micro Futures Contracts: Purpose and Mechanics, Tick Size and Tick Value: The Foundation of Position Sizing

Tick value: The dollar amount gained or lost per one-tick price movement in a futures contract; for example, $12.50 per tick in ES versus $1.25 per tick in MES. Used in: Why Micro Contracts Are Essential for Prop Traders: Execution Costs, Position Sizing, and Compliance, Notional Value vs. Margin: Why Margin Alone Blinds Prop Traders to Real Risk, Tick Size and Tick Value: The Foundation of Position Sizing

Trailing drawdown: The maximum cumulative loss from the account's peak balance during a trading session or period. It is used to calculate safety net requirements. Used in: Why Your Profit Split Isn't Your Real Payout: The Hidden Math Between 100% and What You Actually Withdraw, End of Day vs Intraday Trailing Drawdown: What Funded Traders Need to Know, Trailing Drawdown, Explained: Why a 25K Apex Is Not a 100K Apex

Unrealized P&L: Profit or loss on open positions that has not yet been locked in by closing the trade. Used in: End of Day vs Intraday Trailing Drawdown: What Funded Traders Need to Know

Use: The ratio of notional exposure to account equity; for example, 5:1 use means controlling $250,000 in notional value with a $50,000 account. Used in: Notional Value vs. Margin: Why Margin Alone Blinds Prop Traders to Real Risk

Commodities

Backwardation: A futures curve structure in which forward contracts trade at lower prices than nearer contracts, typically indicating high convenience yield from immediate inventory. It signals that supply is tight and current inventory commands a premium relative to deferred delivery. Used in: The Storage Theory of Commodity Prices: Convenience Yield Explained

Basis: The difference between the price of a commodity in the local cash market and the price of the corresponding futures contract. Used in: Agricultural Seasonality: Planting, Harvest, and Price Patterns, Spread Tracker: Related Futures Contracts

Carrying cost: The cost of storing a commodity over time, including storage fees, insurance, and financial carrying charges; determines the forward price in markets with adequate supply. Used in: Agricultural Seasonality: Planting, Harvest, and Price Patterns

Compliance risk: The probability that an OPEC member country will not implement its agreed production target due to domestic fiscal or political pressures. This risk complicates price responses to announcements because markets cannot know at announcement time whether cuts will be honored. Used in: OPEC Announcements and Oil: How Supply News Gets Priced

Contango: A futures curve structure in which forward contracts trade at higher prices than nearer contracts, typically reflecting positive net carry costs. It occurs when the cost of storing and financing inventory exceeds the convenience yield from holding it. Used in: The Storage Theory of Commodity Prices: Convenience Yield Explained, Agricultural Seasonality: Planting, Harvest, and Price Patterns

Convenience Yield: The benefit or implicit return earned by holding physical inventory of a commodity rather than its futures contract, typically highest during supply scarcity. It represents the option value of immediate access to the commodity for production or to meet sudden demand. Used in: The Storage Theory of Commodity Prices: Convenience Yield Explained

Cost of Carry: The cumulative cost of holding a physical commodity to a future date, including interest on capital, physical storage fees, insurance, and transportation. It is the key determinant of the spot-futures price relationship in the absence of convenience yield. Used in: The Storage Theory of Commodity Prices: Convenience Yield Explained

Crop year: The 12-month marketing period for a commodity, typically beginning at harvest; for US corn, the crop year runs September to August. Used in: Agricultural Seasonality: Planting, Harvest, and Price Patterns

Futures curve: The set of prices quoted simultaneously for crude oil contracts expiring at different future dates; an upward-sloping curve typically indicates the market expects lower near-term supply or higher future demand. Used in: OPEC Announcements and Oil: How Supply News Gets Priced, The Storage Theory of Commodity Prices: Convenience Yield Explained

Harvest: The period when a mature crop is gathered from the field; for most grains in the Northern Hemisphere, occurs in fall. Used in: Agricultural Seasonality: Planting, Harvest, and Price Patterns

Price discovery: The process by which new information about supply or demand is rapidly incorporated into asset prices through the trading activity of market participants buying and selling financial instruments. Used in: OPEC Announcements and Oil: How Supply News Gets Priced

Seasonal spread: The price difference between two contract months (typically nearby and deferred), which widens and narrows predictably through the year in response to supply timing. Used in: Agricultural Seasonality: Planting, Harvest, and Price Patterns

Spot market: The market for immediate or near-immediate delivery of physical crude oil, which typically responds more slowly to price-moving news than futures markets due to higher transaction costs and logistical constraints. Used in: OPEC Announcements and Oil: How Supply News Gets Priced

Spot Price: The current market price for immediate or near-immediate delivery of the physical commodity, which serves as the anchor point for calculating theoretical futures prices under the storage theory. Used in: The Storage Theory of Commodity Prices: Convenience Yield Explained

Supply shock: A sudden, unexpected change in the quantity of oil available in the market. Distinguishing genuine supply shocks from repeated rhetoric is essential for accurately predicting price responses to OPEC announcements. Used in: OPEC Announcements and Oil: How Supply News Gets Priced

Term structure: The relationship between crude oil futures prices for different contract expiration dates; the magnitude of price moves in response to OPEC announcements depends on which contract horizons are examined. Used in: OPEC Announcements and Oil: How Supply News Gets Priced

Prediction Markets

AND contract: A binary contract that pays $1 if all of two or more specified outcomes occur, $0 otherwise. Used in: Combinatorial and Conditional Markets: Pricing Events That Depend on Other Events

Binary contract: A financial contract that pays a fixed amount if a specified condition occurs and zero otherwise. Used in: Liquidity in Prediction Markets: Depth, Spreads, and Why Small Markets Are Hard to Trade

Circuit breaker: A trading halt triggered by exchange rules when price moves exceed a threshold, designed to slow volatility and allow information dissemination. Used in: Why Prediction Market Prices Move Before News Breaks

Combinatorial market: A market in which a single contract's payoff depends on the joint outcome of two or more underlying events. Used in: Combinatorial and Conditional Markets: Pricing Events That Depend on Other Events, Combinatorial and Conditional Markets: Pricing Dependent Events

Conditional market: A contract whose payoff is contingent on the resolution of another contract; often implemented as a conditional order type that activates only if the condition market meets a specified state. Used in: Combinatorial and Conditional Markets: Pricing Events That Depend on Other Events

Conditional order: A market order that remains inactive until a specified condition contract resolves; once the condition is met, the order activates as a limit order on a contingent contract. Used in: Combinatorial and Conditional Markets: Pricing Events That Depend on Other Events

Conditional probability: The probability of event B given that event A has occurred, denoted P(B | A) and calculated as P(A ∩ B) / P(A). Used in: Combinatorial and Conditional Markets: Pricing Dependent Events

Correlation: A measure of how the probabilities of two or more events move together; positive correlation means both events are more likely to co-occur than under independence. Used in: Combinatorial and Conditional Markets: Pricing Events That Depend on Other Events, The Diversification Threshold: Why 20-30 Stocks Are Enough (And More Isn't)

Efficient markets hypothesis: The proposition that asset prices fully reflect all available information, so no trader can systematically outperform the market based on public information. Used in: Prediction Market Prices as Probability Estimators: Theory and Breakdown Points

Implied probability: The probability derived from a market price, calculated as the observed market price assuming a $1 payoff at resolution. Used in: Combinatorial and Conditional Markets: Pricing Events That Depend on Other Events, Favorite-Longshot Bias in Prediction Markets, The Favorite-Longshot Bias: Decades of Evidence from Betting Markets

Information asymmetry: A situation in which one party to a trade possesses material information that the other party lacks, creating an incentive to exploit the informational advantage. Used in: Prediction Market Prices as Probability Estimators: Theory and Breakdown Points, Institutional Order Handling and the "Smart Money" Premise: What Exchange Rules and Research Actually Show, Why Prediction Market Prices Move Before News Breaks, Smart Money and Market Microstructure: Exchange Rules, Evidence, and Retail Narrative

Joint probability: The probability that two or more events both occur, denoted P(A ∩ B); under independence, equals the product of marginal probabilities. Used in: Combinatorial and Conditional Markets: Pricing Dependent Events

Martingale: A stochastic process where the expected future value equals the current value; in risk-neutral pricing, discounted contract prices are martingales. Used in: Combinatorial and Conditional Markets: Pricing Dependent Events

Odds convergence: The tendency for implied probabilities to approach realized frequencies as sample sizes grow, absent systematic behavioral biases. Used in: The Favorite-Longshot Bias: Decades of Evidence from Betting Markets

Operationalization risk: The uncertainty about how a contract's outcome will be measured or adjudicated, leading to ambiguity in settlement. Used in: Prediction Market Prices as Probability Estimators: Theory and Breakdown Points

OR contract: A binary contract that pays $1 if at least one of two or more specified outcomes occurs, $0 otherwise. Used in: Combinatorial and Conditional Markets: Pricing Events That Depend on Other Events

Order book depth: The quantity of contracts posted at each price level away from the midpoint; deep order books allow large trades with minimal price concessions. Used in: Liquidity in Prediction Markets: Depth, Spreads, and Why Small Markets Are Hard to Trade

Pari-mutuel betting: A wagering system in which all bets of a given type are pooled and the payoff to winners is determined by dividing the total pool by the number of winning bets, after deducting a house take. Used in: The Favorite-Longshot Bias: Decades of Evidence from Betting Markets

Pre-public information: Facts or signals known to a subset of market participants before they enter formal public disclosure or news media channels. Used in: Why Prediction Market Prices Move Before News Breaks

Prediction market: A venue where contracts whose payoff depends on the outcome of a real-world event trade based on participants' beliefs about that outcome's probability. Used in: Why Prediction Market Prices Move Before News Breaks, Liquidity in Prediction Markets: Depth, Spreads, and Why Small Markets Are Hard to Trade

Price impact: The adverse price movement caused by a trader's own order, which typically increases with order size and decreases with market liquidity. Used in: Liquidity in Prediction Markets: Depth, Spreads, and Why Small Markets Are Hard to Trade

Risk premium: The additional return required by investors to compensate for uncertainty beyond the base expected value, reflecting how much traders fear unfavorable tail outcomes. Used in: Why Prediction Market Prices Move Before News Breaks, Overnight Session Returns Strategy

Risk-neutral probability: The probability derived from an asset price under the assumption that traders are indifferent to risk and price the asset at its expected payout; also called implied probability. Used in: Prediction Market Prices as Probability Estimators: Theory and Breakdown Points, Combinatorial and Conditional Markets: Pricing Dependent Events

Settlement date: The date at which a prediction market resolves and all contracts expire, with payment determined by the real-world outcome. Used in: Liquidity in Prediction Markets: Depth, Spreads, and Why Small Markets Are Hard to Trade

Tail risk: The risk of an outcome far in the distribution's tail; in joint distributions, the risk that many events occur together with lower probability than models predict. Used in: Combinatorial and Conditional Markets: Pricing Dependent Events

Takeout: The percentage commission or vigorish retained by the betting operator; in North American horse racing, typically 15 to 20 percent of the wagered pool. Used in: The Favorite-Longshot Bias: Decades of Evidence from Betting Markets

Time decay: The erosion in the value of a position or the opportunity cost of capital tied up in a contract as time passes without resolution. Used in: Prediction Market Prices as Probability Estimators: Theory and Breakdown Points

Quantitative

Base rate: The historical frequency or statistical probability of an outcome in a defined population, used to anchor discretionary judgments and prevent pure narrative reasoning from dominating investment decisions. Used in: Quant Core, Human Gate: An AI Investor-Committee for Daily Stock Plans

Benjamini-Hochberg Procedure: A method that controls false discovery rate rather than family-wise error rate, allowing some false positives provided they are a controlled fraction of discoveries. Used in: Multiple-Testing Correction in Strategy Research

Bonferroni Correction: An adjustment that divides the significance threshold by the number of tests performed to control the familywise error rate; simple but conservative and may reduce statistical power. Used in: Multiple-Testing Correction for Strategy Research: Why Many Tested Rules Produce a Winner by Chance, Multiple-Testing Correction in Strategy Research, Multiple-Testing Correction in Strategy Research: The Problem of Spurious Findings

Catalyst: A near-term, identifiable corporate or market event such as an earnings announcement, regulatory filing, or competitor action that is expected to move a stock's price or valuation. Used in: Quant Core, Human Gate: An AI Investor-Committee for Daily Stock Plans

Chronological walk-forward split: A backtesting discipline in which a dataset is divided into sequential in-sample and out-of-sample periods to simulate live deployment without lookahead bias. Used in: Auditing Your Own Edge: Results From a Cross-Asset Backtesting Program

Confidence score: A quantitative ranking from 0 to 100 assigned to each stock by a backtested statistical engine, reflecting the strength of historical edge in the stock's historical price and feature patterns before any catalyst or fundamental analysis. Used in: Quant Core, Human Gate: An AI Investor-Committee for Daily Stock Plans

Cross-venue disagreement: Variation in the price of the same event contract across different exchanges, potentially offering arbitrage or relative-value opportunities. Used in: A Committee of Agents for Prediction-Market Trading: Design of a Paper-Only Kalshi System

False Discovery Rate: The expected proportion of spurious findings among all discoveries reported as significant. It is less conservative than family-wise error rate control because it tolerates some false positives provided their proportion remains bounded. Used in: Multiple-Testing Correction in Strategy Research: The Problem of Spurious Findings

False Discovery Rate (FDR): The expected proportion of false positives among all rejected hypotheses in a multiple-testing procedure, less stringent than familywise error rate control. Used in: Multiple-Testing Correction for Strategy Research: Why Many Tested Rules Produce a Winner by Chance, Multiple-Testing Correction in Strategy Research

Family-Wise Error Rate: The probability that at least one false positive occurs among all hypothesis tests conducted. This probability approaches certainty as the number of tests increases, assuming independence. Used in: Multiple-Testing Correction in Strategy Research: The Problem of Spurious Findings

Family-Wise Error Rate (FWER): The probability of making at least one false positive rejection across all statistical tests in a group. Used in: Multiple-Testing Correction in Strategy Research

Familywise Error Rate (FWER): The probability of committing at least one Type I error (false positive) across all tests in a group of hypothesis tests. Used in: Multiple-Testing Correction for Strategy Research: Why Many Tested Rules Produce a Winner by Chance

Fixed fractional: A position-sizing rule that risks a constant percentage of current account equity on each trade, with position size scaling automatically after gains and losses. Used in: Position Sizing: Fixed Fractional, Kelly Criterion, and Why Full Kelly Hurts

Fractional Kelly: A position-sizing rule that applies a fraction (commonly 0.25 to 0.5) of the Kelly-optimal fraction to reduce drawdown severity while sacrificing some theoretical edge. Used in: Position Sizing: Fixed Fractional, Kelly Criterion, and Why Full Kelly Hurts, The Kelly Criterion vs. Fixed Risk: Which Sizing Method Works for Prop Traders

Hard block: A veto condition in the committee system that automatically rejects a candidate due to phantom price, dead book, or adverse price movement on volume, regardless of other analysts' votes. Used in: A Committee of Agents for Prediction-Market Trading: Design of a Paper-Only Kalshi System

Hidden Markov model: A statistical model in which the true state (regime) is unobserved, but observations (returns) are generated probabilistically by that hidden state. Used in: Regime Detection: Rolling Volatility, Markov Switching, and the Overfitting Trap

Holdout set: A portion of historical data reserved and untouched during model development and validation, opened only once at the end to provide an unbiased performance estimate free from data-mining bias. Used in: Auditing Your Own Edge: Results From a Cross-Asset Backtesting Program

In-sample fit: Performance metrics computed on the same data used to estimate model parameters; typically overestimates future performance. Used in: Regime Detection: Rolling Volatility, Markov Switching, and the Overfitting Trap

Markov chain: A stochastic process in which the state at the next time step depends only on the current state, not on the history of prior states. Used in: Regime Detection: Rolling Volatility, Markov Switching, and the Overfitting Trap

Momentum: A strategy that buys assets with the strongest recent price performance and sells those with the weakest, based on the empirical tendency of price trends to persist over intermediate horizons. Used in: Auditing Your Own Edge: Results From a Cross-Asset Backtesting Program

Multiple Comparisons Problem: Testing many hypotheses on the same dataset inflates the probability of false positives beyond the significance level of any single test. When hundreds of rules are tested, random variations produce apparent winners by chance. Used in: Multiple-Testing Correction in Strategy Research: The Problem of Spurious Findings

Multiple Testing: The testing of many statistical hypotheses on a single dataset, which increases the probability of finding spurious results by chance; also called data snooping or p-hacking. Used in: Multiple-Testing Correction for Strategy Research: Why Many Tested Rules Produce a Winner by Chance

Multiple-Comparisons Problem: The statistical phenomenon that testing many hypotheses increases the probability that at least one will appear significant by chance alone, even if all null hypotheses are true. Used in: Multiple-Testing Correction in Strategy Research

Multiple-testing correction: A statistical adjustment that raises the significance threshold for accepting results as real when many hypotheses are tested on the same dataset, reducing the probability of false discoveries due to chance. Used in: Auditing Your Own Edge: Results From a Cross-Asset Backtesting Program

Out-of-sample performance: Performance metrics computed on data that was not used to estimate model parameters; a more realistic measure of practical utility. Used in: Regime Detection: Rolling Volatility, Markov Switching, and the Overfitting Trap

Out-of-Sample Testing: Evaluation of a strategy on historical data that was not used during model optimization, testing whether the model generalizes beyond its training period. Used in: Multiple-Testing Correction for Strategy Research: Why Many Tested Rules Produce a Winner by Chance, Reading Academic Finance Papers as a Trader: A Framework for Evaluating Research Credibility, Reading Academic Finance Research as a Practitioner: Extracting Actionable Insight from Published Studies, Multiple-Testing Correction in Strategy Research: The Problem of Spurious Findings

Overfitting: The phenomenon in which a model fits noise or irregular features in historical data, reducing its ability to generalize to new data. Used in: Regime Detection: Rolling Volatility, Markov Switching, and the Overfitting Trap, Premium-Discount Asymmetry: Range-Midpoint Filter for Long and Short Entries, Multiple-Testing Correction for Strategy Research: Why Many Tested Rules Produce a Winner by Chance, Expectancy: Connecting Win Rate, Payoff, and Costs, Multiple-Testing Correction in Strategy Research: The Problem of Spurious Findings, Killzone Time Filtering: Session-Based Entry Restriction in Mechanical Trading, Backtesting and the Three Systematic Biases, An Anti-Overfit Protocol for Strategy Backtesting on TradingView

p-Hacking: The practice of testing many hypotheses and reporting only those with low p-values, inflating false-positive rates. Used in: Multiple-Testing Correction in Strategy Research

Permutation Test: A non-parametric test that simulates the null distribution by repeatedly shuffling the data and recalculating the test statistic. Used in: Multiple-Testing Correction in Strategy Research

Permutation Testing: A resampling method that shuffles data and retests a strategy on each shuffled sample to determine whether real performance exceeds what random chance would generate. Used in: Multiple-Testing Correction for Strategy Research: Why Many Tested Rules Produce a Winner by Chance

Pine Script v6: TradingView's proprietary scripting language for writing custom indicators and trading strategies on its charting platform. Used in: An Anti-Overfit Protocol for Strategy Backtesting on TradingView

Plan-only boundary: An operational constraint that restricts an AI agent to generating and recommending fully reasoned investment plans while forbidding it from executing, placing, or modifying real orders. Used in: Quant Core, Human Gate: An AI Investor-Committee for Daily Stock Plans

Pre-Registration: Specification of trading rules and statistical methods before examining historical data. It converts a data-mining search into formal hypothesis testing and eliminates multiple-comparisons bias for the registered rules. Used in: Multiple-Testing Correction in Strategy Research: The Problem of Spurious Findings

Realized volatility: The standard deviation of log returns over a fixed lookback period, typically 20 to 60 trading days, annualized for comparison. Used in: Regime Detection: Rolling Volatility, Markov Switching, and the Overfitting Trap, Volatility and the VIX: What the Index Measures and What It Does Not, Time-of-Day Volatility Curve

Regime: An unobservable market state characterized by a distinct set of statistical properties, such as volatility, mean return, or correlation structure. Used in: Regime Detection: Rolling Volatility, Markov Switching, and the Overfitting Trap, Premium-Discount Asymmetry: Range-Midpoint Filter for Long and Short Entries, Opening Range Breakout, Order-Block Continuation: Zone Definition, Entry, and the Case for Skepticism, Transaction-Cost Modelling: Slippage, Spread and Impact Assumptions that Decide Whether a Backtest Survives, Expectancy: Connecting Win Rate, Payoff, and Costs, Day-of-Week Performance Table

Round-turn cost: The total transaction cost for opening and closing a position, calculated as the sum of spread, market impact, slippage, and broker fees on both entry and exit. Used in: Transaction-Cost Modelling: Slippage, Spread and Impact Assumptions that Decide Whether a Backtest Survives

Selection bias: The contamination that occurs when multiple strategy variants are tested silently and only the best-performing variant is reported, ignoring the failed attempts that preceded it. Used in: An Anti-Overfit Protocol for Strategy Backtesting on TradingView

Train/validation split: A methodological division of historical data into a training window used for parameter optimization and a validation window used for out-of-sample testing without parameter adjustment. Used in: An Anti-Overfit Protocol for Strategy Backtesting on TradingView

Transition matrix: A table of probabilities governing the likelihood of moving from one regime to another; in a time-homogeneous Markov chain, these probabilities are constant. Used in: Regime Detection: Rolling Volatility, Markov Switching, and the Overfitting Trap

Type I Error: Rejection of a true null hypothesis, producing a false positive; a result that appears significant when none actually exists. Used in: Multiple-Testing Correction for Strategy Research: Why Many Tested Rules Produce a Winner by Chance

Order Flow & Structure

Auction market theory: A framework that interprets financial markets as continuous auctions where prices discover value through the distribution of trading volume across price levels. Fair value emerges at price levels with the highest accumulation of trading activity. Used in: Auction Market Theory: Value Area, Point of Control, and Single Prints

Bid-ask imbalance: The disparity in volume or concentration between orders resting on the buy side and orders resting on the sell side across price levels. Used in: Footprint Charts: Market Depth and Bid-Ask Distribution

Break-even win rate: The minimum percentage of winning trades required for a strategy to generate zero profit or loss over time, determined by the risk-reward ratio. Used in: Win Rate vs. Risk-Reward: The Math That Kills Most Funded Traders

Breakaway gap: A gap occurring at the beginning of a significant price trend with low probability of being filled, typically triggered by directional news. Used in: Gap Fill Probability: Why Most Gaps Don't Fill the Day They Open

Diagonal imbalance: A structural pattern in a footprint chart where bids are concentrated away from the spread and asks are concentrated away from the spread, producing a visually diagonal profile; indicates that resting orders are placed with wider margins. Used in: Footprint Charts: Market Depth and Bid-Ask Distribution

Dollar volume: The product of price and share volume, representing the monetary value of shares traded in a given period. VWAP weights each price level by dollar volume rather than share count to reflect where capital was deployed. Used in: VWAP: Calculation, Institutional Benchmarking, and Band Analysis

Execution benchmark: An objective target price or value against which a portfolio manager or broker measures the quality of completed trades. Provides a deterministic basis for evaluating execution performance without subjective tuning. Used in: VWAP: Calculation, Institutional Benchmarking, and Band Analysis

Exhaustion: A condition where aggressive order flow diminishes as price reaches an extreme, causing reversals or stalls due to participant withdrawal rather than opposing institutional demand. Used in: Volume Absorption: Reading Liquidity Walls Before Price Rejection

Exhaustion gap: A gap occurring near the end of a price move with high probability of being filled within days, often signaling potential reversal. Used in: Gap Fill Probability: Why Most Gaps Don't Fill the Day They Open

Footprint chart: A visualization of the limit order book that displays bid and ask volumes at each price level, typically aggregated over a discrete time interval, to show the structural distribution of resting orders. Used in: Footprint Charts: Market Depth and Bid-Ask Distribution, Volume Absorption: Reading Liquidity Walls Before Price Rejection

Gap-and-go: A market condition where a large gap opens outside the previous day's range in volatile conditions and rarely fills intraday, indicating sustained directional momentum. Used in: Gap Fill Probability: Why Most Gaps Don't Fill the Day They Open

Globex: The CME's electronic trading platform where futures trade continuously outside regular trading hours, including overnight sessions between RTH close and open. Used in: Gap Fill Probability: Why Most Gaps Don't Fill the Day They Open

High Volume Node: A price level where trading activity clustered significantly higher than surrounding levels, often functioning as support or resistance where price consolidates. Used in: Volume Absorption: Reading Liquidity Walls Before Price Rejection

Initiative order: An order that demands immediacy and liquidity, typically a market order that accepts the quoted bid or ask price; the trader who submits an initiative order is exposing themselves to adverse selection and is assumed to be more informed. Used in: Initiative and Responsive Activity: Information Asymmetry at the Extremes

Intraday mean reversion: The empirical observation, asserted by some practitioners, that prices drifting away from their intraday volume-weighted average tend to reverse toward it. Forms the basis for VWAP band trading strategies and support/resistance identification. Used in: VWAP: Calculation, Institutional Benchmarking, and Band Analysis

Lee-Ready algorithm: A price-based method for classifying buy-initiated versus sell-initiated trades, developed by Lee and Ready (1991); compares the trade price to the bid-ask midpoint and uses tick direction when price is exactly at the spread midpoint. Used in: Initiative and Responsive Activity: Information Asymmetry at the Extremes

Limit order book: The record maintained by an exchange of all resting (unfilled) buy and sell orders, ranked by price and time. Used in: Footprint Charts: Market Depth and Bid-Ask Distribution

Liquidity wall: A concentration of passive limit orders at a specific price level that absorbs incoming orders without allowing significant price advancement. Used in: Volume Absorption: Reading Liquidity Walls Before Price Rejection

Low Volume Node: A price level where trading activity was minimal or absent, typically resulting in rapid directional price movement. Used in: Volume Absorption: Reading Liquidity Walls Before Price Rejection

Market depth: The volume of buy and sell orders resting at each price level; a measure of liquidity supply at various price points. Used in: Footprint Charts: Market Depth and Bid-Ask Distribution

Market profile: A two-dimensional visualization of trading activity with price on the vertical axis and cumulative volume on the horizontal axis. It displays the distribution of trading volume across all price levels during a specified period. Used in: Auction Market Theory: Value Area, Point of Control, and Single Prints, Value Area Breakout with Acceptance Testing

Order absorption: A condition where large incoming aggressive orders are filled by passive limit orders at a specific price level with minimal or no price movement, indicating institutional defense of that level. Used in: Volume Absorption: Reading Liquidity Walls Before Price Rejection

Order flow: The rate and direction at which trades are executed; the actual buying or selling pressure translated into executed volume, as distinct from resting orders. Used in: Footprint Charts: Market Depth and Bid-Ask Distribution, Market Makers: Liquidity Providers and the Bid-Ask Spread, The Fair Value Gap: Definition, Formation, and Chart Marking, Index Rebalancing and Predictable Order Flow, Initiative and Responsive Activity: Information Asymmetry at the Extremes

Participation-weighted algorithm: An algorithmic trading strategy that scales order size in proportion to observed intraday volume, with the goal of executing near VWAP without moving prices significantly. Reduces market impact by aligning participation with natural volume flow. Used in: VWAP: Calculation, Institutional Benchmarking, and Band Analysis

Point of control (POC): The single price level with the highest volume of trading activity during a specified time period. It is interpreted as the price where the largest number of transactions reached agreement. Used in: Auction Market Theory: Value Area, Point of Control, and Single Prints, Value Area and Point of Control

Price extremes: Local highs, lows, or technical support and resistance levels at which traders or algorithms concentrate order flow; these regions are examined because they often precede reversals or continuations depending on the nature of the order flow. Used in: Initiative and Responsive Activity: Information Asymmetry at the Extremes

Pullback entry: A trade initiated when price retreats toward a support level after moving away from it, with entry typically triggered by a reversal signal at that level. Used in: VWAP: The Institutional Benchmark That Turns Pullbacks Into Entries

R-multiple: The actual profit or loss on a trade expressed as a multiple of the planned risk amount (e.g., if you risked $100 and made $300, the result is +3R). Used in: Win Rate vs. Risk-Reward: The Math That Kills Most Funded Traders

Regime filter: A condition applied to trading rules that restricts entry signals to specific market conditions, such as trending versus ranging environments, to improve signal reliability. Used in: VWAP: The Institutional Benchmark That Turns Pullbacks Into Entries

Responsive order: An order that supplies liquidity by accepting or taking the opposite side of an initiative trade; typically a limit order already on the book or a market order reacting to a price level or news event. Used in: Initiative and Responsive Activity: Information Asymmetry at the Extremes

Resting order: A limit order placed on the exchange but not yet filled; an order awaiting execution on the limit order book. Used in: Footprint Charts: Market Depth and Bid-Ask Distribution

RTH (Regular Trading Hours): The official market session for a futures contract, typically 9:30 a.m. To 4:00 p.m. ET for US equity index futures. Used in: Gap Fill Probability: Why Most Gaps Don't Fill the Day They Open

Session benchmark: A price reference point established during a single trading day's activity, serving as a standard against which intraday price movements are measured. Used in: VWAP: The Institutional Benchmark That Turns Pullbacks Into Entries

Single print: A price level that was traded at only once or very sparsely, with minimal time-price-opportunity (TPO) representation. Auction theory interprets single prints as areas the market tested but rejected due to supply-demand imbalance. Used in: Auction Market Theory: Value Area, Point of Control, and Single Prints

TPO (Time Price Opportunity): A unit of time, typically one minute, associated with each price level at which trading occurred. TPOs are aggregated to build the market profile and identify concentration or sparsity of volume at each price. Used in: Auction Market Theory: Value Area, Point of Control, and Single Prints

Value area: The price range containing approximately 70% of total trading volume during a time period. It represents the zone where the market reached consensus on fair value; prices outside it are considered overvalued or undervalued by that session. Used in: Auction Market Theory: Value Area, Point of Control, and Single Prints, Value Area and Point of Control, Value Area Breakout with Acceptance Testing

Volume Weighted Average Price (VWAP): An intraday indicator that calculates the average price at which a security traded, weighted by the volume at each price level, and resets at the start of each new trading session. Used in: VWAP: The Institutional Benchmark That Turns Pullbacks Into Entries

Volume-Weighted Average Price (VWAP): The cumulative ratio of dollar volume to share volume from market open to the current time, reset daily. Used as a benchmark for measuring intraday execution quality and guiding algorithmic order placement. Used in: VWAP: Calculation, Institutional Benchmarking, and Band Analysis

VWAP band: An upper or lower envelope plotted one or more standard deviations away from VWAP, based on volume-weighted deviations of price from the running VWAP line. Indicates intraday volatility and volume concentration shifts. Used in: VWAP: Calculation, Institutional Benchmarking, and Band Analysis

Price Action (ICT / SMC)

Best Execution: A broker's legal obligation under SEC Rule 10b-1 to execute customer orders in a manner that achieves the best overall results, measured by price, speed, likelihood of execution, and settlement finality. Used in: Institutional Order Handling and the "Smart Money" Premise: What Exchange Rules and Research Actually Show, Smart Money and Market Microstructure: Exchange Rules, Evidence, and Retail Narrative

Clustering: The non-random concentration of orders, particularly stops, at round numbers, psychological price levels, or technical support and resistance zones. Used in: Inducement and Liquidity Pools: Theory Versus Tick Data Evidence

Data-mining bias: The risk that repeated hypothesis testing across many subsets of data produces apparent patterns by chance, rather than due to a real underlying relationship. Used in: Order Blocks: Concept, Skepticism, and Empirical Evidence

Front-Running: Trading ahead of a customer order by a broker or market maker for the broker's own account, a violation of securities law and criminal fraud. Used in: Institutional Order Handling and the "Smart Money" Premise: What Exchange Rules and Research Actually Show, Index Rebalancing and Predictable Order Flow

Gap filling: Subsequent trading activity that brings price back into a previously unfilled gap range. Used in: The Fair Value Gap: Definition, Formation, and Chart Marking

Impulse candle: A candlestick that moves sharply in one direction, typically preceding or coinciding with a fair value gap in trading frameworks. Used in: The Fair Value Gap: Definition, Formation, and Chart Marking

Inducement: The deliberate movement of price through a concentrated level of stop-loss orders to trigger their execution and profit from the resulting volume and price movement. Used in: Inducement and Liquidity Pools: Theory Versus Tick Data Evidence

Institutional flow: Buy or sell orders placed by large asset managers, hedge funds, or principal trading firms, whose sizes measurably move prices. Used in: Killzones and Session Timing: When Volume Actually Arrives

Intraday gap: A price discontinuity that occurs within a single trading session, as distinct from overnight or opening gaps between sessions. Used in: The Fair Value Gap: Definition, Formation, and Chart Marking

Killzone: A specific intraday time window, often defined by session boundaries or market open times, where higher volume and volatility are expected. Named for the practitioner belief that profitable trading opportunities concentrate in these windows. Used in: Killzones and Session Timing: When Volume Actually Arrives, Session Killzone Shading, Killzone Time Filtering: Session-Based Entry Restriction in Mechanical Trading

Liquidity pool: A concentration of buy and sell orders at a particular price level; in the inducement context, often refers to the collective stop orders believed to cluster at technical levels. Used in: Inducement and Liquidity Pools: Theory Versus Tick Data Evidence

Liquidity void: A price level or narrow range where few buy or sell orders reside. Used in: Order Blocks: Concept, Skepticism, and Empirical Evidence

Market Maker: A firm that quotes both buy and sell prices for a security, earning the bid-ask spread. Market makers assume inventory risk and must comply with quote obligations. Used in: Institutional Order Handling and the "Smart Money" Premise: What Exchange Rules and Research Actually Show, Market Makers: Liquidity Providers and the Bid-Ask Spread, Liquidity in Prediction Markets: Depth, Spreads, and Why Small Markets Are Hard to Trade

Market microstructure: The mechanics and processes by which prices are determined and orders are executed in financial markets, including order book dynamics and liquidity provision. Used in: The Fair Value Gap: Definition, Formation, and Chart Marking, Equity Session Ranges: Overnight vs Regular Hours

Order accumulation: The build-up of client trading requests at a financial institution during hours when the destination market is closed, released upon market open and creating an initial volume and volatility spike. Used in: Killzones and Session Timing: When Volume Actually Arrives

Order priority: Rules governing the sequence in which orders are executed when multiple orders exist at the same price; typically time-price priority (first in, first out at a given price). Used in: Smart Money and Market Microstructure: Exchange Rules, Evidence, and Retail Narrative

Payment for Order Flow: A legal arrangement in which brokers route customer orders to market makers or other venues in exchange for compensation, subject to SEC rules ensuring execution quality is not harmed. Used in: Institutional Order Handling and the "Smart Money" Premise: What Exchange Rules and Research Actually Show

Session overlap: A period during which two geographically distinct financial markets are simultaneously open and active, creating potential for coordinated institutional order flow. Used in: Killzones and Session Timing: When Volume Actually Arrives

Spoofing: Placing orders with the intent to cancel them before execution to create a false impression of supply or demand. Spoofing is a federal crime under the Dodd-Frank Act. Used in: Institutional Order Handling and the "Smart Money" Premise: What Exchange Rules and Research Actually Show

Stop-loss order: A market or limit order triggered when price reaches a specified level, typically placed to limit losses on a position. Used in: Inducement and Liquidity Pools: Theory Versus Tick Data Evidence

Tick data: High-frequency time-series data recording the price, size, and timestamp of every trade execution, used to study market microstructure and order flow. Used in: Inducement and Liquidity Pools: Theory Versus Tick Data Evidence

Time-price priority: The order execution rule that grants priority by price first (best prices filled first), then by time of submission at each price level. Used in: Smart Money and Market Microstructure: Exchange Rules, Evidence, and Retail Narrative

Uptick Rule: A regulation under Regulation SHO requiring short sales to occur at a price higher than the previous trade. The uptick rule prevents aggressive short selling manipulation. Used in: Institutional Order Handling and the "Smart Money" Premise: What Exchange Rules and Research Actually Show

Volume clustering: Concentration of trading volume into a shorter time window than typical for the broader session, observable at session boundaries and market opens. Used in: Killzones and Session Timing: When Volume Actually Arrives

Indicators

Accumulation: A market phase in which buyers consistently exceed sellers in volume or contract size, typically reflected in rising cumulative delta. Used in: Cumulative Delta Proxy from Volume, Cumulative Delta Proxy

Age Counter: The number of consecutive candles price has remained outside the Donchian channel since the initial breakout close. Used in: Donchian Channel with Breakout Age Counter

Alert Threshold: A multiplier applied to standard deviation to define dynamic upper and lower bands that trigger alerts when the current range deviates significantly from its average. Used in: Daily Range Percentage Tracker with Alerts

Amplitude: The vertical distance between a swing high and swing low, measured in price units. Used in: Measured Move Projector

Anchor point: A user-selected bar from which a calculation begins and extends forward to establish the starting reference for price or volume analysis. Used in: Anchored VWAP

Anchored VWAP: A VWAP calculation that begins from a user-selected historical bar and extends forward to the present, providing a dynamic reference for volume-weighted average price over a custom lookback window. Used in: Anchored VWAP

Arbitrage: The simultaneous purchase of one contract and sale of another to exploit temporary price differences, constrained by transaction costs and carry charges. Used in: Spread Tracker: Related Futures Contracts

ATR: Average True Range; a volatility measure computed as the 14-bar average of the true range, used to scale thresholds to current market volatility conditions. Used in: Order Block Zones with Objective Displacement Rules

ATR (Average True Range): A technical indicator measuring market volatility by calculating the average of true ranges over a specified period, where true range accounts for overnight gaps. Used in: Daily Range Percentage Tracker with Alerts, Time-of-Day Volatility Curve, Order-Block Continuation: Zone Definition, Entry, and the Case for Skepticism, Failed Breakout Fade, Prior-Day Breakout with Stop Clustering

Auto-scaling: A dynamic feature that adjusts grid spacing based on the current price range to maintain consistent visual reference and legible line spacing across different zoom levels. Used in: Round Number and Quarter Level Grid

Average Daily Range: A moving average of the prior N periods' daily high-to-low ranges, used as a volatility baseline to contextualize the size of the current opening range. Used in: Trend Day vs Range Day Classifier

Average return: The arithmetic mean of returns observed during a specific calendar month across all years in the lookback period. Used in: Seasonality Heat Strip: Month-of-Year Average Returns, Seasonality Heat Strip

Background shading: A Pine Script feature that fills the chart background with a solid color across a specified range of bars to visually highlight a window of interest. Used in: Turn-of-Month Countdown

Backtesting window: The span of historical data used to compute or test an indicator or strategy; different windows can yield materially different results due to regime changes, corporate actions, and market structure shifts. Used in: Seasonality Heat Strip

Band Squeeze: A sharp narrowing of volatility band width caused by declining ATR, typically preceding a directional expansion. Used in: ATR-Based Volatility Bands

Bandwidth: The distance between the upper and lower Bollinger Bands, expressed in price units; contracts during low-volatility periods and expands during high volatility. Used in: Bollinger Band Squeeze Meter

Bar index: A running counter of bars on the chart, used to position objects such as boxes and labels at specific chart locations. Used in: Opening Range Box, Anchored VWAP

Bar State Memory: Persistence of variables across candles, enabling the counter to accumulate without resetting each bar. Used in: Donchian Channel with Breakout Age Counter

Barcolor(): A Pine Script function that applies background colors to individual bars on the chart for visual pattern highlighting or identification. Used in: Inside & Outside Bar Highlighter

barstate.islast: A Pine Script function that evaluates to true only on the most recent bar on the chart, used to execute code once per chart update rather than on every bar. Used in: Prior Day Levels

Basis risk: The risk that the spread between two related positions does not move as expected, resulting in a loss despite the relative positioning being correct. Used in: Spread Tracker: Futures Pair, Combinatorial and Conditional Markets: Pricing Events That Depend on Other Events

Bearish Alignment: A state where the closing price is trading below its moving average on a given timeframe, signaling downtrend confirmation. Used in: Multi-Timeframe Moving Average Alignment Panel

Bearish divergence: Price prints a higher high while the momentum oscillator prints a lower high, suggesting weakening upward momentum. Used in: RSI Divergence Flagger with Strict Pivot Rules, RSI Divergence: Mechanical Definition and Null-Hypothesis Testing, RSI Divergence Flagger

Bearish Gap: A gap formed when price opens below the prior candle's low, creating a downward void; conventionally interpreted as a potential resistance or liquidity level on any rally. Used in: Fair Value Gap Marker with Mitigation Tracking, Gap Tracker: Overnight Gap Size and Fill Status

Bid/ask data: Market microstructure information showing volume offered at each price level on both sides of the order book; unavailable from standard candle data and required for true delta. Used in: Cumulative Delta Proxy

Body: The thick portion of a candlestick between the open and close, representing the net price movement over the bar period. Used in: Wick Ratio Analyzer: Rejection Candles Quantified

Bollinger Bands: A volatility indicator consisting of a middle moving average and two outer bands positioned at a specified number of standard deviations above and below the average, used to identify statistically extreme levels. Used in: Spread Tracker: Futures Pair, Keltner Channels vs Bollinger Bands Overlay, Bollinger Band Squeeze Meter

Breadth: The number or proportion of securities participating in a price move; high breadth indicates many securities moving together (strong trend), low breadth indicates few securities moving (weak or narrow trend). Used in: New High/New Low Breadth Indicator

Break of Structure: A price move that exceeds a recent swing extreme while the prior swing extreme was more pronounced in the same direction, confirming momentum continuation.

Used in: Swing Structure: BOS and CHoCH Labels, Swing Structure & Break of Structure Marker

Break of Structure (BOS): A price movement that exceeds the prior swing high in an uptrend or the prior swing low in a downtrend, confirming trend continuation. Used in: Swing Structure: BOS & CHoCH Marker

Bullish Alignment: A state where the closing price is trading above its moving average on a given timeframe, signaling uptrend confirmation. Used in: Multi-Timeframe Moving Average Alignment Panel

Bullish divergence: Price prints a lower low while the momentum oscillator prints a higher low, suggesting weakening downward momentum. Used in: RSI Divergence Flagger with Strict Pivot Rules, RSI Divergence: Mechanical Definition and Null-Hypothesis Testing, RSI Divergence Flagger

Bullish Gap: A gap formed when price opens above the prior candle's high, creating an upward void; conventionally interpreted as a potential support or liquidity level on any pullback. Used in: Fair Value Gap Marker with Mitigation Tracking, Gap Tracker: Overnight Gap Size and Fill Status

Calendar spread: The price difference between two futures contracts on the same underlying commodity or index but with different expiration months. Used in: Spread Tracker: Related Futures Contracts

Camarilla Pivots: A pivot method that scales the day's range by fixed fractional coefficients applied to the close, producing a tighter band of levels closer to price than Floor Trader. Used in: Pivot Points: Floor Trader vs. Camarilla Comparison

Change of Character: A reversal in the pattern of swing extremes, such as a shift from decreasing lows to increasing lows, indicating a potential shift in directional structure.

Used in: Swing Structure: BOS and CHoCH Labels, Swing Structure & Break of Structure Marker

Change of Character (CHoCH): A price movement that breaks above a prior swing high during a downtrend or below a prior swing low during an uptrend, signaling a potential shift in trend direction. Used in: Swing Structure: BOS & CHoCH Marker

Climax: An abnormally high or low volume reading, typically marking a period of intense market activity near support, resistance, or trend turning points. Used in: Volume Climax Detector

Climax volume: An extreme surge or collapse in volume relative to recent ranges, often associated with reversals, breakout attempts, or capitulation. Used in: Volume Climax Detector (Z-Score)

Close price: The final traded price of an asset during a bar's time interval. Used in: Anchored VWAP

Confirmation: The alignment of price action such as breakouts or reversals with elevated volume, indicating participant commitment to the directional move. Used in: Relative Volume vs N-Day Average

Consecutive closes: A sequence of closing prices in which each close is higher (or lower) than the previous close, ending when the direction reverses or a close equals the prior close. Used in: Consecutive Close Counter with Streak Statistics

Consensus: Complete agreement across all selected timeframes regarding direction; a state in which all timeframes show bullish or bearish alignment simultaneously. Used in: Multi-Timeframe Moving Average Alignment Panel

Consolidation: A period in which price high and low remain within a defined range for a specified number of bars, signaling reduced directional pressure. Used in: Order Block Zones with Objective Displacement Rules, Opening Range Box, Inside & Outside Bar Highlighter

Continuous contract series: A synthetic price history created by chaining successive futures contracts through roll dates and adjusting for discontinuities to create an unbroken historical record. Used in: Spread Tracker: Related Futures Contracts

Contract roll: The transition from an expiring futures contract to the next active contract in the same series, typically accompanied by a shift in open interest and potential temporary spread distortions. Used in: Spread Tracker: Futures Pair, Futures Contract Roll and Expiry Week Shading, Futures Contract Expiry Week Reversion

Conviction: The strength of participant commitment to a price move, inferred from volume size and consistency. Used in: Relative Volume vs N-Day Average, Quant Core, Human Gate: An AI Investor-Committee for Daily Stock Plans

Correlation coefficient: A statistical measure ranging from −1 to +1 that quantifies the linear relationship between two variables; +1 indicates perfect positive co-movement, 0 indicates no linear relationship, and −1 indicates perfect negative co-movement. Used in: Rolling Correlation Between Two Symbols

Covariance: The expected value of the product of two variables' deviations from their respective means; high covariance indicates both variables tend to deviate in the same direction. Used in: Rolling Correlation Between Two Symbols

Cumulative delta: A running sum of the difference between volume traded on up-candles and volume on down-candles, measuring net accumulation or liquidation pressure over time.

Used in: Cumulative Delta Proxy from Volume, Cumulative Delta Proxy

Cumulative sum: A running total that adds each new value to the prior sum, creating a monotonically increasing or decreasing sequence. Used in: Anchored VWAP

Day of week: A categorical variable representing the calendar weekday on which each bar opened, with values 1 for Monday through 7 for Sunday. Used in: Day-of-Week Performance Table

Dayofmonth(): A Pine Script function that returns the numeric day of the month (1-31) for the timestamp of the current bar. Used in: Turn-of-Month Countdown

Delta: Net volume difference between up and down price moves; positive when more volume trades on up ticks, negative on down ticks. Used in: Cumulative Delta Proxy, Volume Absorption: Reading Liquidity Walls Before Price Rejection

Demand block: An order block zone formed during bullish consolidation, expected to act as support if price returns to it. Used in: Order Block Zones with Objective Displacement Rules

Direction change: A bar on which the close direction (up, down, or flat) differs from the prior bar's close direction, signaling the end of the current streak. Used in: Consecutive Close Counter with Streak Statistics

Directional volume: Volume assigned a positive or negative sign based on whether price moved above or below a reference level (prior close, open, or high) during the period. Used in: Cumulative Delta Proxy from Volume

Discount zone: Price trading below the rolling range midpoint. Used in: Premium and Discount Zones from Rolling Range Midpoint, Premium and Discount Zones

Displacement: A break of an order block boundary by a threshold amount, typically measured in volatility units such as ATR, confirming material testing of the zone. Used in: Order Block Zones with Objective Displacement Rules, Fair Value Gap Retracement Strategy, Order-Block Continuation: Zone Definition, Entry, and the Case for Skepticism, Order Block Displacement Zones

Distribution: Net outflow of volume from a security, represented by falling cumulative delta. Used in: Cumulative Delta Proxy

Divergence: A situation in which price rises but confirming indicators (such as breadth, volume, or momentum) fail to rise together, warning of weakening trend conviction. Used in: New High/New Low Breadth Indicator, Cumulative Delta Proxy from Volume, RSI Divergence Flagger with Strict Pivot Rules, Cumulative Delta Proxy, RSI Divergence: Mechanical Definition and Null-Hypothesis Testing

Doji: A candlestick where open and close are equal or nearly equal, resulting in little to no body, indicating price indecision or equilibrium between buyers and sellers. Used in: Wick Ratio Analyzer: Rejection Candles Quantified

Donchian Channel: A volatility band marking the highest high and lowest low over a lookback period, typically used to frame support and resistance levels. Used in: Donchian Channel with Breakout Age Counter

Down volume: Volume transacted on candles that close below the prior close, interpreted as selling interest. Used in: Cumulative Delta Proxy

Early Session: The initial hours after market open, typically 1 to 8 hours, during which the opening range is established and measured for trend or range classification. Used in: Trend Day vs Range Day Classifier

Expiry date: The final day on which a futures contract can be traded, after which the contract is settled or delisted. Used in: Futures Contract Roll and Expiry Week Shading

Fair value: The price level or range where a session's trading volume concentrated most densely. Used in: Value Area and Point of Control, Futures Contract Expiry Week Reversion

Fair Value Gap (FVG): An unfilled price discontinuity formed when consecutive candles do not overlap, leaving a zone in the order book where trades did not occur, commonly hypothesized to represent clustering of pending limit orders. Used in: Fair Value Gap Marker with Mitigation Tracking

Fill transparency: A visual parameter controlling the opacity of gap shading, allowing overlapping gaps or other chart elements to remain visible. Used in: Gap Tracker: Overnight Gap Size and Fill Status

Floor Trader Pivots: A classical pivot system that derives support and resistance by subtracting or adding the day's range to the pivot point itself, producing levels symmetrically offset from the pivot. Used in: Pivot Points: Floor Trader vs. Camarilla Comparison

Front contract: The nearest contract month currently being traded and typically the most liquid month for a given futures instrument. Used in: Futures Contract Roll and Expiry Week Shading

Gap fill: The intraday moment when price trades at or beyond the prior close level, neutralizing the overnight discontinuity. Used in: Gap Tracker: Overnight Gap Size and Fill Status, Gap Fill Probability: Why Most Gaps Don't Fill the Day They Open

Gap Mitigation: The event in which price enters and fills (or touches) the gap zone, potentially triggering execution of orders that were waiting in that zone. Used in: Fair Value Gap Marker with Mitigation Tracking

Grid overlay: A set of evenly spaced horizontal reference lines overlaid on a price chart to provide visual segmentation and price reference points. Used in: Round Number and Quarter Level Grid

Heat strip: A visual representation using colored blocks arranged in a row or grid, where color intensity and hue encode the magnitude and sign of a numerical metric such as returns or volatility. Used in: Seasonality Heat Strip

High and Low: The highest and lowest prices traded during a session or period, representing the extreme boundaries of price action. Used in: Prior Day Levels

Hold period: The number of bars following an order block formation during which price remains near the block level without deep retracement, validating the block's structure. Used in: Order Block Displacement Zones

Intercommodity spread: The price difference between futures contracts on related but distinct products, such as crude oil and refined petroleum products. Used in: Spread Tracker: Related Futures Contracts

Intrabar return: The percentage change from a bar's open price to its close price, calculated as (close − open) / open × 100. Used in: Day-of-Week Performance Table

Intraday breakout: A price move that closes above the opening range high or below the opening range low, often viewed as a signal of directional conviction. Used in: Opening Range Box

Intraday Pattern: A recurring, predictable behavior within a single trading day, as opposed to day-to-day or seasonal patterns. Used in: Time-of-Day Volatility Curve

Intraday timeframe: A chart period shorter than one day, typically ranging from one minute to several hours. Used in: Prior Day High, Low, and Settlement

Keltner Channels: A volatility envelope constructed from a moving average basis and bands set at a fixed multiple of the Average True Range, capturing full price movement range including intraday gaps and reversals. Used in: Keltner Channels vs Bollinger Bands Overlay

Lagging Indicator: An indicator calculated from historical price data that describes the past and adapts to current market conditions with a delay, rather than predicting future direction. Used in: Keltner Channels vs Bollinger Bands Overlay

Leap year: A calendar year with 366 days occurring every four years, except for years divisible by 100 unless also divisible by 400; February has 29 days instead of 28 in leap years. Used in: Turn-of-Month Countdown

Liquidity Clustering: The practitioner belief that pending limit orders accumulate at price levels where prior trading activity ceased, especially unfilled gaps. Used in: Fair Value Gap Marker with Mitigation Tracking

Liquidity sweep: A price move through a technical level (prior high or low) that triggers stop-losses, followed by a reversal that closes the bar back inside the level, suggesting institutional or algorithmic participation in the move. Used in: Liquidity Sweep Detector

Lookahead Bias: Using future data to calculate a predictive level; avoided by using only the previous period's OHLC to compute levels valid for the current period. Used in: Pivot Points: Floor Trader vs. Camarilla Comparison, RSI Divergence Flagger with Strict Pivot Rules, Donchian Channel with Breakout Age Counter, Backtesting and the Three Systematic Biases, An Anti-Overfit Protocol for Strategy Backtesting on TradingView

Lookback Period: The number of bars examined in a rolling window to identify swing highs and lows; shorter periods increase sensitivity and noise, while longer periods reduce noise but may miss structural detail. Used in: Swing Structure: BOS & CHoCH Marker, Seasonality Heat Strip: Month-of-Year Average Returns, New High/New Low Breadth Indicator, Consecutive Close Counter with Streak Statistics, Volume Climax Detector (Z-Score), Measured Move Projector, Volatility Regime Bands from Percentile-Ranked ATR, Volume Climax Detector, Day-of-Week Performance Table, Swing Structure & Break of Structure Marker, Relative Volume vs N-Day Average

Measured Move: A projection that replicates the amplitude of a prior swing in the same or opposite direction, used to estimate potential price targets. Used in: Measured Move Projector

Mid-price: The average of the high and low price for a bar, used as a representative price level when other prices are not specified. Used in: Session VWAP with Standard Deviation Bands

Midpoint: The arithmetic mean of the highest high and lowest low over a rolling lookback period; represents the fair-value reference level. Used in: Premium and Discount Zones from Rolling Range Midpoint, Premium and Discount Zones

Momentum confirmation: The alignment of price extremes with similar extremes in a momentum oscillator, confirming technical support for a price move. Used in: RSI Divergence Flagger

Momentum exhaustion: A heuristic concept suggesting that a streak approaching or matching its historical maximum within a lookback period may indicate weakening directional conviction; lacking empirical statistical validation. Used in: Consecutive Close Counter with Streak Statistics

Month-of-year effect: A statistical observation that certain months tend to produce higher or lower average returns than others; also called intra-year seasonality. Used in: Seasonality Heat Strip: Month-of-Year Average Returns

Move (ATR multiples): The session's move in points divided by the current ATR value, expressing how many units of average volatility the price has traveled from the open. Used in: Session Open Anchored Move Measure

Move (points): The price difference between the session open and the current bar's close, expressed in the instrument's native unit such as dollars, index points, or pips. Used in: Session Open Anchored Move Measure

Moving average: The arithmetic mean of a series of values over a fixed number of prior periods, used to smooth short-term volatility and reveal trend. Used in: Spread Tracker: Futures Pair, ATR-Based Volatility Bands

Moving Average (MA): A price line calculated by averaging closing prices over a specified number of periods; used to identify trend direction and filter short-term price noise. Used in: Multi-Timeframe Moving Average Alignment Panel

Multi-Timeframe Analysis: The examination of price behavior and technical indicators across multiple time horizons to distinguish true trends from short-term noise and assess signal reliability. Used in: Multi-Timeframe Moving Average Alignment Panel

New high: A price level that is the highest closing price for a security over a specified lookback period, often used to gauge strength and bullish momentum. Used in: New High/New Low Breadth Indicator

New low: A price level that is the lowest closing price for a security over a specified lookback period, often used to gauge weakness and bearish momentum. Used in: New High/New Low Breadth Indicator

Normal distribution: A statistical bell-curve model assuming most values cluster near the mean with symmetrical tails; markets often exhibit fatter tails and skew, violating this assumption. Used in: Volume Climax Detector (Z-Score)

Open interest: The total number of outstanding (unsettled) futures contracts of a given type at a specific time. Used in: Futures Contract Roll and Expiry Week Shading, Contract Expiry Week Roll Cycle Fade

Opening Range: The highest high and lowest low price recorded during the first hours of a trading session, forming the initial price band for the day. It is reset each new session and serves as the basis for detecting directional breakouts.

Used in: Trend Day vs Range Day Classifier, Opening Range Breakout, Opening Range Box

Option assignment: The exercise of an option contract, obligating the seller to deliver the underlying asset (call option) or receive it (put option) at the strike price. Used in: Turn-of-Month Countdown

Order block: A price zone corresponding to recent consolidation or reversal, hypothesized to align with institutional order concentration and used as a reference for support, resistance, or entry levels.

Used in: Order Block Zones with Objective Displacement Rules, Order Blocks: Concept, Skepticism, and Empirical Evidence, Order-Block Continuation: Zone Definition, Entry, and the Case for Skepticism, Order Block Displacement Zones, Killzone Time Filtering: Session-Based Entry Restriction in Mechanical Trading

Outside bar: A bar whose high exceeds the prior bar's high and whose low falls below the prior bar's low, representing expanded price action. Used in: Inside & Outside Bar Highlighter

Overlay indicator: An indicator that plots on top of price bars on a chart rather than in a separate pane below. Used in: Session Killzone Shading

Overnight gap: A discontinuity between the prior day's close and the current day's open, caused by price movement during after-hours or overnight sessions when the primary market is closed. Used in: Prior Day Levels, Gap Tracker: Overnight Gap Size and Fill Status

Overnight session: The period from market close (4:00 PM ET) to market open (9:30 AM ET) the following day on US equities, during which trading occurs on alternative trading systems with reduced liquidity compared to regular hours. Used in: Equity Session Ranges: Overnight vs Regular Hours, Overnight Session Returns Strategy

Pairs trading: A market-neutral strategy that buys one security and shorts another to profit from the convergence or divergence of their prices, often relying on historical correlation. Used in: Rolling Correlation Between Two Symbols

Pearson correlation: The most common form of correlation, calculated as the covariance of two variables divided by the product of their standard deviations. Used in: Rolling Correlation Between Two Symbols

Percentile Rank: A statistical measure indicating the percentage of values in a dataset that are equal to or below the current value; a rank of 80 per cent means the current value exceeds 80 per cent of historical observations. Used in: Volatility Regime Bands from Percentile-Ranked ATR, Bollinger Band Squeeze Meter

Pivot: A local extremum, a bar that is higher than bars both to its left and right (high pivot) or lower than bars both to its left and right (low pivot). Used in: RSI Divergence Flagger with Strict Pivot Rules

Pivot high: A price bar whose high is the maximum value over a lookback period, marking a local swing top. Used in: RSI Divergence Flagger

Pivot low: A price bar whose low is the minimum value over a lookback period, marking a local swing bottom. Used in: RSI Divergence Flagger

Pivot Point: A local price extreme where market direction reverses; synonymous with swing high or swing low. Used in: Swing Structure: BOS & CHoCH Marker, Pivot Points: Floor Trader vs. Camarilla Comparison, Swing Structure: BOS and CHoCH Labels

Premium zone: Price trading above the rolling range midpoint. Used in: Premium and Discount Zones from Rolling Range Midpoint, Premium and Discount Zones

Price bucketing: The process of aggregating volume into discrete price intervals by rounding prices to a fixed step size. Used in: Value Area and Point of Control

Prior Day Levels: An indicator that plots the previous trading day's high, low, and close prices as horizontal reference lines on the current chart, providing intraday context and potential support or resistance zones. Used in: Prior Day Levels

Prior high/low: The highest high or lowest low within the specified lookback period; used as a reference level to identify structural support and resistance. Used in: Liquidity Sweep Detector

Prior trading day: The most recent complete market session before the current one. Used in: Prior Day High, Low, and Settlement

Proxy: A substitute measure used when a direct measure is unavailable; cumulative delta derived from volume serves as a proxy for true bid-ask delta when exchange microstructure data is not published. Used in: Cumulative Delta Proxy from Volume

Psychological price level: A price point that attracts attention and order placement due to round, memorable, or aesthetically significant values rather than economic mechanisms. Used in: Round Number and Quarter Level Grid

Quarter level: A subdivision at 0.25, 0.50, or 0.75 of a round-number interval that provides intermediate reference points between whole numbers on a price chart. Used in: Round Number and Quarter Level Grid

Range Day: A trading session in which the opening range is narrow relative to historical average daily volatility and price remains largely within the previous session's boundaries, typically featuring consolidation rather than directional movement. Used in: Trend Day vs Range Day Classifier

Range Percentage: The daily high-low spread expressed as a percentage of the closing price; enables comparison of price movement magnitude across instruments and price levels. Used in: Daily Range Percentage Tracker with Alerts

Rebalancing: The periodic adjustment of portfolio holdings to maintain target asset allocations, often triggered by calendar dates or when allocations drift beyond specified thresholds. Used in: Turn-of-Month Countdown, Market Cycles Within Cycles: Why Portfolio Rebalancing Traps Long-Term Investors Into Selling Cheap

Reclaim: Price's return past a broken level in the opposite direction, typically signaling rejection of the initial directional push and renewed control by the opposite side. Used in: Liquidity Sweep Detector

Regime Change: A sudden structural shift in market behavior, such as a volatility spike or liquidity disruption, that invalidates assumptions built on recent historical patterns. Used in: Daily Range Percentage Tracker with Alerts, Paper Trading: What It Can Prove and What It Cannot

Rejection candle: A candlestick with one or both wicks significantly longer than its body, indicating price advanced or declined in one direction then reversed at a level of supply or demand. Used in: Wick Ratio Analyzer: Rejection Candles Quantified

Repainting: A behavior where an indicator recalculates past values after new data arrives, creating a false sense of historical accuracy. Used in: Seasonality Heat Strip: Month-of-Year Average Returns, Consecutive Close Counter with Streak Statistics, Value Area and Point of Control, Session Open Anchored Move Measure, ATR-Based Volatility Bands, Session Killzone Shading, Opening Range Box, Seasonality Heat Strip, Premium and Discount Zones, Order Block Displacement Zones, Volume Climax Detector, Day-of-Week Performance Table, An Anti-Overfit Protocol for Strategy Backtesting on TradingView

Request.security(): A Pine Script function that fetches OHLCV data (open, high, low, close, volume) for a symbol other than the current chart symbol, enabling multi-symbol analysis on a single chart. Used in: New High/New Low Breadth Indicator, Prior Day Levels, Multi-Timeframe Moving Average Alignment Panel

Resistance: A price level where supply is historically expected to be sufficient to arrest a rally or trigger a pullback, as estimated by a calculation method. Used in: Pivot Points: Floor Trader vs. Camarilla Comparison, Failed Breakout Fade, Inside & Outside Bar Highlighter

Resistance level: A price region where rising prices tend to pause or reverse. Used in: Prior Day High, Low, and Settlement, Wick Ratio Analyzer: Rejection Candles Quantified

Roll period: The window of days preceding contract expiry during which most traders shift positions to the next contract month, often resulting in reduced liquidity in the expiring contract. Used in: Futures Contract Roll and Expiry Week Shading

Rolling range: The highest high and lowest low values computed over a fixed number of preceding bars; resets and shifts forward with each new bar. Used in: Premium and Discount Zones from Rolling Range Midpoint, Premium and Discount Zones

Rolling window: A fixed-length subset of historical data that shifts forward one bar at a time, allowing a metric to be recalculated at each bar using only the most recent N observations. Used in: Rolling Correlation Between Two Symbols

Round number: A whole price unit such as 100.00, 500.00, or 1000.00 that serves as a psychological price target or order-clustering point. Round numbers are often used as support and resistance zones, reflecting trader convention rather than inherent market structure. Used in: Round Number and Quarter Level Grid

RSI (Relative Strength Index): A momentum oscillator that measures the speed and magnitude of price changes on a scale of 0 to 100, calculated as 100 − [100 / (1 + RS)], where RS is the average of N-period gains divided by the average of N-period losses. Used in: RSI Divergence Flagger with Strict Pivot Rules, Order-Block Continuation: Zone Definition, Entry, and the Case for Skepticism, RSI Divergence Flagger

Santa Claus rally: A practitioner-observed pattern in which stock markets tend to rally in late November and December; such seasonal patterns have no guarantee of repeating in future periods. Used in: Seasonality Heat Strip: Month-of-Year Average Returns

Seasonal pattern: The tendency for prices or returns to exhibit consistent behavior during the same calendar period across multiple years, independent of current market fundamentals. Used in: Seasonality Heat Strip: Month-of-Year Average Returns

Seasonality: A recurring pattern in asset returns or volatility corresponding to specific calendar periods (months, quarters, days of the week), observed consistently across years and independent of macroeconomic fundamentals. Used in: Seasonality Heat Strip

Seasonality heat strip: A table displaying average returns by calendar month in a color-coded matrix, where color intensity reflects historical strength of returns for each month. Used in: Seasonality Heat Strip: Month-of-Year Average Returns

Session: A defined continuous time period during which trading volume is aggregated; session boundaries reset at specified intervals. Used in: Value Area and Point of Control, Session Killzone Shading, Opening Range Box, Session VWAP with Standard Deviation Bands, Equity Session Ranges: Overnight vs Regular Hours, Gap Tracker: Overnight Gap Size and Fill Status

Session open: The first trade price of a defined trading period such as a day, week, or other interval. For US equities, the regular session opens at 09:30 ET; extended sessions may include pre-market or after-hours trading. Used in: Session Open Anchored Move Measure

Settlement: The official closing price of a security at the end of a trading session. Used in: Prior Day High, Low, and Settlement, Prior Day Levels

Sigma (σ): The symbol for standard deviation in statistical notation; 'n sigma' expresses a multiple of the standard deviation and defines alert band width. Used in: Daily Range Percentage Tracker with Alerts

Simple Moving Average: A rolling average of data points calculated over a specified period to smooth noisy data and identify underlying trends. Used in: Daily Range Percentage Tracker with Alerts, Relative Volume vs N-Day Average

Spread: The price difference between two related financial instruments, calculated as the closing price of one futures contract minus the closing price of another. Used in: Spread Tracker: Futures Pair, Spread Tracker: Related Futures Contracts

Squeeze: A period of abnormally low volatility in which Bollinger Bands narrow sharply, often preceding a large directional move. Used in: Bollinger Band Squeeze Meter

Standard deviation: A statistical measure of how far a series of values typically deviates from their mean; higher values indicate greater volatility or dispersion. Used in: Spread Tracker: Futures Pair, Daily Range Percentage Tracker with Alerts, Time-of-Day Volatility Curve, Keltner Channels vs Bollinger Bands Overlay, Volume Climax Detector (Z-Score), Session VWAP with Standard Deviation Bands, Bollinger Band Squeeze Meter, Rolling Correlation Between Two Symbols, Volume Climax Detector

Standard Deviation Band: An upper or lower boundary at a fixed multiple of standard deviation above or below a central line, such as VWAP; it quantifies the range of normal versus exceptional price movement. Used in: Session VWAP with Standard Deviation Bands

Stop-loss absorption: The act of triggering sell-side stops above a level or buy-side stops below a level, often followed by removal of those orders as institutions exit counter-positions. Used in: Liquidity Sweep Detector

Streak length: The count of bars in the current run of closes moving in one direction (up or down); resets to one each time the close direction reverses or becomes flat. Used in: Consecutive Close Counter with Streak Statistics

Supply and Demand Zones: Price levels where concentrated buying or selling has created support or resistance; highs often represent supply zones and lows represent demand zones. Used in: Swing Structure & Break of Structure Marker

Supply block: An order block zone formed during bearish consolidation, expected to act as resistance if price approaches it again. Used in: Order Block Zones with Objective Displacement Rules

Support: A price level where demand is historically expected to be sufficient to arrest a decline or trigger a bounce, as estimated by a calculation method. Used in: Pivot Points: Floor Trader vs. Camarilla Comparison, Failed Breakout Fade, Inside & Outside Bar Highlighter

Support and resistance: Price levels where historical buying or selling interest has concentrated, causing price to stabilize or reverse; the opening range high and low serve as near-term reference points. Used in: Opening Range Box, Round Number and Quarter Level Grid

Support level: A price region where falling prices tend to pause or reverse. Used in: Prior Day High, Low, and Settlement, Wick Ratio Analyzer: Rejection Candles Quantified

Swing High: A local price maximum identified when the current bar's high equals the highest high within a specified lookback window. Used in: Swing Structure: BOS & CHoCH Marker, Order Block Zones with Objective Displacement Rules, Swing Structure: BOS and CHoCH Labels, RSI Divergence Mechanical Strategy with Null Testing, Measured Move Projector, Order Block Displacement Zones, RSI Divergence: Mechanical Definition and Null-Hypothesis Testing, Swing Structure & Break of Structure Marker

Swing Low: A local price minimum identified when the current bar's low equals the lowest low within a specified lookback window. Used in: Swing Structure: BOS & CHoCH Marker, Auditable Trend Continuation: Converting Discretionary Price-Action Rules into Testable Mechanical Logic, Order Block Zones with Objective Displacement Rules, Swing Structure: BOS and CHoCH Labels, RSI Divergence Mechanical Strategy with Null Testing, Measured Move Projector, Order Block Displacement Zones, RSI Divergence: Mechanical Definition and Null-Hypothesis Testing, Swing Structure & Break of Structure Marker

Swing point: A local high or low on a price chart; used as a reference level for technical analysis and stop placement. Used in: Liquidity Sweep Detector

Threshold (Ticks): The minimum gap size, expressed in price increments, required before the indicator records a gap; filters out minor intrabar noise. Used in: Fair Value Gap Marker with Mitigation Tracking

Time-of-Day Effect: An empirical regularity in which market volatility, volume, bid-ask spreads and price discovery efficiency vary predictably by hour of the trading day. Used in: Time-of-Day Volatility Curve

Trap: A price break beyond a key level that fails to sustain, often accompanied by declining volume as conviction fades. Used in: Relative Volume vs N-Day Average

Trend Day: A trading session in which the opening range breaks above or below the previous session's price extremes by at least a specified threshold, indicating sustained directional momentum in early hours. Used in: Trend Day vs Range Day Classifier

True Range: The greatest of three values on any bar: the high-low range, the absolute high-to-prior-close gap, or the absolute low-to-prior-close gap. It accounts for overnight gaps that simple high-low range would miss. Used in: ATR-Based Volatility Bands, Volatility Regime Bands from Percentile-Ranked ATR

Turn-of-month effect: An empirical tendency for market volatility, returns, and derivatives expiry to cluster in the final or opening days of a calendar month, driven primarily by portfolio rebalancing and fund accounting cycles. Used in: Turn-of-Month Countdown

Up volume: Volume transacted on candles that close above the prior close, interpreted as buying interest. Used in: Cumulative Delta Proxy

UTC: The global standard time against which all time zones are offset, used as the reference basis for quoting exchange and market hours. Used in: Session Killzone Shading

Variance: The average of squared deviations from a mean; standard deviation is the square root of variance and measures the spread of values around a central point. Used in: Session VWAP with Standard Deviation Bands

Volatility: A measure of how much price fluctuates over a given period, typically expressed as a percentage change or absolute price range. Higher volatility means sharper, faster moves. Used in: Time-of-Day Volatility Curve, Session Killzone Shading, Opening Range Box, Equity Session Ranges: Overnight vs Regular Hours, Inside & Outside Bar Highlighter, Dollar-Cost Averaging vs. Lump-Sum Investing: The Data and When Each Works

Volatility Band: A pair of dynamic lines positioned at a fixed multiple of volatility above and below a moving average, forming an envelope that expands and contracts with market volatility. Used in: ATR-Based Volatility Bands

Volatility Regime: A distinct period of market behavior characterized by a consistent level of price movement, which can shift between low and high volatility or between trending and ranging states. Used in: Keltner Channels vs Bollinger Bands Overlay, Volatility Regime Bands from Percentile-Ranked ATR

Volume: The total quantity of shares, contracts, or units traded during a specified period. Used in: Volume Climax Detector, Anchored VWAP

Volume delta (true): The difference between transaction volume initiated at the ask price and volume initiated at the bid price, indicating net buying or selling pressure from market microstructure data. Used in: Cumulative Delta Proxy from Volume

Volume mean: The average volume over a specified lookback period, serving as the baseline expectation for normal trading activity. Used in: Volume Climax Detector (Z-Score)

Volume profile: A histogram showing the distribution of trading volume across discrete price levels. Used in: Value Area and Point of Control, Order Blocks: Concept, Skepticism, and Empirical Evidence, Volume Absorption: Reading Liquidity Walls Before Price Rejection

VWAP (Volume Weighted Average Price): The cumulative sum of price multiplied by volume, divided by cumulative volume over a defined period; it represents the average price weighted by participation at each level. Used in: Session VWAP with Standard Deviation Bands

VWAP (Volume-Weighted Average Price): The ratio of cumulative volume-weighted price to cumulative volume, expressing the average price at which an asset traded over a period, weighted by the volume at each price level. Used in: Anchored VWAP

Wick: The thin line extending from a candlestick's body to the high or low, representing price movement that reversed within the bar period. Used in: Wick Ratio Analyzer: Rejection Candles Quantified, Liquidity Sweep Detector

Wick ratio: The ratio of wick length to body size, quantifying the magnitude of price rejection at a level. Used in: Wick Ratio Analyzer: Rejection Candles Quantified

Z-score: The number of standard deviations a data point lies from the mean; calculated as (value − mean) ÷ standard deviation. Used in: Volume Climax Detector (Z-Score), Volume Climax Detector

Zone offset: An optional percentage-based expansion of the premium and discount boundaries around the midpoint for visual clarity without changing the midpoint itself. Used in: Premium and Discount Zones from Rolling Range Midpoint

Key definitions

Glossary: An alphabetical reference of terms with their definitions and the sources that use them.

References

• Every entry is derived from a published PropLedger paper; each paper carries its own References section.

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Educational research on historical data only. Not investment advice, not a signal, and never a performance promise. Past results do not predict future performance. Every reference is link-verified before publication and every paper is re-audited weekly against the library's editorial standard.

Last reviewed by the PropLedger research pipeline: 2026-10-11. Educational research on historical data, not financial advice.