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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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C#
367
How do I set up cloud computing (Azure/AWS/etc.) to run LEAN? 9 comments, last comment by Zach Oakes,
Py
271
How to loop through my open positions? 6 comments, last comment by Larry Smith,
Py
10.5k
Race Conditions Started by Petter Hansson,
109
Using consolidated bars with indicators 10 comments, last comment by Nico Xenox,
Py
175
Moving from MetaTrader to QuantConnect 8 comments, last comment by Jared Broad,
C#
333
API Error Message: null 3 comments, last comment by Javier Cornejo Alfaro,
C#
166
Returns on Trades 3 comments, last comment by Eldar,
C#
361
Memory Utilization Leak? 4 comments, last comment by Andrzej Fudala,
109
Accessing previous indicator values made with consolidated bars 9 comments, last comment by James Candan,
C#
2.1k
Indicator Updates / After Hours Trading 9 comments, last comment by Jared Broad,
109
Checking if tomorow is a holiday & market hours 1 comment by Mikhail Socrates,
C#
139
Best Practice: writing a helper class (asking for library changes or sticking to a work-around) 8 comments, last comment by Roke Roll,
C#
139
CSV output of trades 7 comments, last comment by Alexandre Catarino,
C#
9
FXCM: UTC-5 no Daylight saving time? 1 comment by Jared Broad,
Py
STAFF
QC Algorithm Plugin Framework - Open Call For Feedback 17 comments, last comment by Sohail,
Py
175
Stop-loss not getting hit 4 comments, last comment by JayJayD,
134
Error Meaning 4 comments, last comment by Alexandre Catarino,
C#
287
DLL Upload Support 1 comment by Alexandre Catarino,
Py
691
Step for changing lots 2 comments, last comment by Alexandr Trenkenshu,
39
How can I schedule an event handler and have the data available? 6 comments, last comment by Karen Chaltikian,
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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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