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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
2.5k
VisualStudio Quantconnect extension 1 comment by Jared Broad,
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7.6k
My algo is so big it hit the maximum characters allowed! Anyone else have this issue? 5 comments, last comment by Non Compete,
Py
1.5k
Level 2 Data 1 comment by Louis Szeto,
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493
Indian Custom Data(from tradingview) not showing the correct SMA values, the second day onwards 1 comment by Louis Szeto,
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Rolling Window size that impacts (but seemingly shouldn't) manual update of manual indicator 4 comments, last comment by Yuri Lopukhov,
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7.6k
Please help: live trading order failure due to margin with plenty of margin available? 1 comment by Louis Szeto,
Py
73
I do not see runtime logs or compilation logs when doing lessons 2 comments, last comment by Louis Szeto,
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138
Issue with History and start_time, end_time 2 comments, last comment by Yuri Lopukhov,
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60
Financials on companies headquartered outside of USA 1 comment by Louis Szeto,
Py
124
Example of an indicator that uses the current price of a security as a daily close 1 comment by Louis Szeto,
Py
12
Live Data for some Binance Crypto Pairs have a value of Zero throughout large parts of the day, for a couple weeks. 1 comment by Louis Szeto,
Py
41
Getting Problem In Setting Up Python Environment for Machine Learning 1 comment by Eden Wheeler,
Py
345
Avoid Options Automatic Exercise 2 comments, last comment by Marty Scholes,
Py
655
Noise calculation for all US stocks 1 comment by Louis Szeto,
Py
4.4k
Increase number of rows displayed from pandas dataframe 1 comment by Li Cheng,
Py
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Help me with picking same day options please 1 comment by David Eldringhoff,
Py
238
Custom Moving Average Indicator - Update Method Error 1 comment by Yuri Lopukhov,
Py
105
Using Bid/Ask to fill Limit Orders in backtests. 1 comment by Louis Szeto,
Py
906
Short interest data? 2 comments, last comment by Nico Xenox,
Py
575
Bug with using local QQQ data 1 comment by Nottakumasato,
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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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