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Radically Open-Source Algorithmic Trading Engine

LEAN is the open-source algorithmic trading engine powering QuantConnect. Founded in 2012 LEAN has been built by a global community of 180+ engineers and powers more than 300+ hedge funds today.

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Help mia 1 comment by Mia Alissi,
Help mia 1 comment by Mia Alissi,
Help mia 1 comment by Mia Alissi,
High Slippage with Future Fill Model 1 comment by Mia Alissi,
Excessive margin requirements for option spreads 2 comments, last comment by David E,
Schwab Stop Loss/Take Profit submission results in brokerage error 1 comment by Mia Alissi,
API Error Message: No spare research nodes. 1 comment by Mia Alissi,
Looking for experiences using QuantConnect/LEAN with B3 (Brazil) data 9 comments, last comment by Mia Alissi,
QuantConnect Futures Boot Camp #4 — Margin Call Lesson: “SetHoldings” not accepted? Did the engine change? 1 comment by Mia Alissi,
Fix Time Stamps 2 comments, last comment by Retrospective Green Ocelot,
QQQ Live Universe Constituent Issue 1 comment by Mia Alissi,
Negative Values 2 comments, last comment by Retrospective Green Ocelot,
Import File 2 comments, last comment by Retrospective Green Ocelot,
Bare minimum subscription to backtest intraday strategy with lean cli and use optimization? 2 comments, last comment by Sergio Soares,
CANNOT open any project!!! 1 comment by Mia Alissi,
ERROR when starting live deploy!! 1 comment by Mia Alissi,
Getting data with Free plan 2 comments, last comment by Jared Broad,
Code conversion Started by YingHe Zhu,
FundamentalUniverseSelectionModel: Backtest differs from Live Trading 1 comment by Alexandre Catarino,
No Coding Session Available ? 3 comments, last comment by Camilo Avella,
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The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by QuantConnect. In addition, the material offers no opinion with respect to the suitability of any security or specific investment. QuantConnect makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances. All investments involve risk, including loss of principal. You should consult with an investment professional before making any investment decisions.

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