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LEAN is the open source algorithmic trading engine powering QuantConnect. Founded in 2013 LEAN has been built by a global community of 80+ engineers and powers more than a dozen hedge funds today.

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Py
19
Plotting APPLE stocks in Python 3 comments, last comment by HanByul P,
Py
59
Bootcamp issue 2 comments, last comment by KianB,
C#
136
How to process local that is already split adjusted? 1 comment by Xiaoming Yu,
Py
9
Same time per day Trade 2 comments, last comment by Michael Manus,
Py
39
Joining Historical Data and Historical Indicators 5 comments, last comment by Corey Davis,
C#
208
Lowest CLOSE 1 comment by Michael Manus,
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283
Understanding buying power calculation and SetHoldings() 7 comments, last comment by Rahul Chowdhury,
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19
Loading Securities - Quantopian Migration 3 comments, last comment by Ethan Scott,
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9
Semi-automatic strategy - question 3 comments, last comment by Michael Manus,
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9
Visual Studio required for LEAN? 2 comments, last comment by Michael Manus,
Py
49
Few questions about evaluation version Started by Muhammad waseem sarwar,
Py
2.6k
Please help me find the error in my calculation 5 comments, last comment by Michael Manus,
C#
9
Newbee question Started by Gouri Nair,
Py
8.1k
Machine Learning 1 8 comments, last comment by Ethan Scott,
Py
217
Protected GetInitialMarginRequiredForOrder() and GetInitialMarginRequiredForOrder() in SecurityMarginModel Started by Weiheng Liang,
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99
Data access for running Lean engine locally 3 comments, last comment by Jared Broad,
C#
239
Custom Indicator 10 comments, last comment by Louis Szeto,
Py
67
OnData cycle through symbols instead of bulk backtest on each 2 comments, last comment by Michael Manus,
Py
69
Custom fee difficulty 1 comment by Michael Manus,
C#
9
Backtesting earning announcemnt trades. 1 comment by Michael Manus,
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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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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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