Polymarket runs a market every five minutes on whether a coin closes higher or lower - 24/7, for seven coins - but there s no such publicly available historical data, at least one I could find. I wanted to backtest a bot against these markets, so I spent a few weeks just recording ther order book: every market, once per second, for BTC/ETH/SOL/XRP/DOGE/HYPE/BNB.It s ~89k markets / ~26.8M per-second top-of-book samples, Mar–May 2026, and I m releasing it into the public domain under CC0.The data will is not good enough to backtest again what real live trading would look like, but it s something to start with if you have nothing. Coverage is 99.8%+ with no duplicates; the only real holes are ~4 short outages on my end (~1.5h total over 7.5 weeks) from my VM dying several times.Links: - https://huggingface.co/datasets/kachoio/polymarket-5-minute-... - https://www.kaggle.com/datasets/kachoio/polymarket-5-minute-...Hopefully some of you may find it useful. It wasn t greatly useful for me, as I gave up after losing several hundred bucks. Either way, I think it s generally hard to be profitable with the fees that are in place now and the vicious competition buit it was good fun to give it a try anyway.