Yes, you are correct, but it's not only order book but also trades, liquidations etc- full market data replay. If you trade on higher time frame, it's not that

Yes, you are correct, but it's not only order book but also trades, liquidations etc- full market data replay. If you trade on higher time frame, it's not that useful, you can use daily OHLC data,but for intraday and more HFT algo strategies it may be handy. General common knowledge is that order book is noise and fake data mostly but I disagree - check out https://www.reddit.com/r/highfreqtrading/comments/av5c4m/market_microstructure_for_the_es_example_data/ https://www.reddit.com/r/highfreqtrading/comments/av5c4m/mar... for some ideas why such data is useful.