Blog
Notes on Polymarket, prediction markets, and trading data.
Polymarket Up-or-Down Crypto Markets, Explained
What Polymarket's Up-or-Down crypto markets are, how 5m, 15m and 4h timeframes resolve, how pricing maps to probability, and what order book data looks like for them.
How to Get Polymarket Historical Order Book Data: API, Bulk Datasets, or Scraping
Three ways to get historical Polymarket order book and trade data — scraping the CLOB yourself, the polyReplay REST API, and bulk Parquet downloads — with the trade-offs of each.
How to Backtest a Polymarket Trading Strategy in Python
A step-by-step guide to backtesting a Polymarket crypto Up-or-Down strategy in Python using polyReplay's historical L25 order book and Binance spot data, with copy-pasteable code.
Welcome to the polyReplay blog
Why we're writing about Polymarket, prediction markets, and trading data.
How to Get Polymarket Historical Data: Order Books, Trades, and Resolved Markets via API
polyReplay is a Polymarket historical data API and bulk dataset provider for crypto prediction markets — L25 order books, trades, and resolved Up-or-Down markets for BTC, ETH, SOL, XRP, DOGE, BNB and HYPE, joined with Binance spot.