> For the complete documentation index, see [llms.txt](https://predictback.gitbook.io/predictback-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://predictback.gitbook.io/predictback-docs/get-started/readme.md).
# What is PredictBack?
PredictBack is a **quantitative backtesting and research platform for prediction markets**, starting with **Polymarket**. Most participants approach prediction markets by taking a **directional opinion**: *Yes or No, long or short, belief or disbelief*. PredictBack is built to push beyond that. We help users test **rule-based, automated trading strategies** across many markets, time periods, and regimes—so you can understand how your logic behaves *in aggregate*, not just in a single conviction trade.
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**Why PredictBack Exists**
Backtesting is the scientific method of trading:
* You **formalize a hypothesis** (your strategy)
* You test it on **historical data**
* You **control for confounders** like fees, liquidity, and execution
* Only then do you consider live deployment
In traditional markets, traders rely on mature tooling (Backtrader, LEAN, MultiCharts, etc.) to do this rigorously. Prediction markets, despite growing rapidly, lack comparable research infrastructure. PredictBack fills that gap.
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