A free library for traders who want the actual math.

PropLedger is a free, growing research library for futures, stock, commodity and prediction-market traders. Every weekday it adds a new paper and a new open-source Pine Script indicator, organised by market (Stocks, Futures, Commodities, Prediction Markets) and by method (Start Here, Quantitative, Order Flow & Structure, Price Action, Indicators). How papers are sourced and checked is public: see the editorial standard.

The papers are written to be checked, not believed. Claims carry their assumptions, formulas and sample sizes; strategy work follows a pre-registered, anti-overfit backtesting protocol with chronological splits, realistic costs and untouched holdouts. When a test finds no edge, the paper says so.

Indicators ship with the full source, explained line by line, so you can read what they do before you put them on a chart. The prop-firm calculators load each firm's published rules — daily loss, trailing drawdown, consistency — so you can size against the real numbers instead of a guess.

Nothing here is sold. There are no accounts, no signals, no paid tiers and no promises about passing an evaluation. It is educational research on historical data, published openly.