Tested the stuff from your comments on my 100+ strategies post (and found a mistake in my own test)

Your post was removed under **Rule 2 (high-quality questions only)**. Generic “which data vendor should I use?” posts usually lack the detail needed for meaningful discussion. **Commonly used market data providers:** - **Yfinance** - **Massive.com** - **Databento** - **FMP** If you repost, please include details such as: - asset classes and markets - symbols or venues - historical vs real-time - granularity and depth - licensing or redistribution needs - latency expectations - budget constraints *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/algotrading) if you have any questions or concerns.*