LEAN Documentation & Tutorials
Read free at quantconnect.com →QuantConnect provides a free cloud-based algorithmic trading platform with extensive documentation and tutorials covering strategy development, backtesting, and live trading. The LEAN engine is open-source and the educational material around it is substantial — from beginner tutorials to advanced multi-asset strategy guides. For aspiring quant traders, this is arguably the best free starting point because you learn by building and testing real strategies, not just reading theory. The platform supports Python and C#. Drawback: the documentation assumes programming comfort, the community forums vary in quality, and you'll eventually want paid data or compute. But as a free algorithmic trading education platform, nothing else comes close.
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Pair this platform with Algorithmic Trading by Ernest Chan for strategy concepts. Quantitative Trading covers the business side. Browse our Best Free Trading Books list.