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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
692
Only one of the legs of he bull put vertical spread gets exercised on expiration 4 comments, last comment by Alexandre Catarino,
Py
1.8k
Historical Options - Pricing Model & Profit 1 comment by Alethea Lin,
Py
1.2k
Interactive Brokers combination orders 3 comments, last comment by Jack Simonson,
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Self.Schedule.On and Control Flow 3 comments, last comment by Jason Mark,
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219
How to use indicator in helper class 1 comment by Alethea Lin,
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2.7k
Logging Data and Algo Functionality 1 comment by Jason Mark,
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258
Extending Historical Data 1 comment by Alethea Lin,
Py
1.6k
Using of RollingWindow Started by Islander,
Py
2.8k
Multiple Insight support and constrcution 1 comment by Alethea Lin,
Py
1.2k
Running tests on a local Windows 10/Visual Studio dev environment 3 comments, last comment by Frank Norman,
Py
1.6k
LEAN config for live custom data from local disk 4 comments, last comment by Pavel Paramonov,
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330
Treasury Futures don't seem to have data until May'09 and then get flash liquidated in Jan'10? 2 comments, last comment by Jack Simonson,
C#
14.4k
DateTime & DayOfWeek test 2 comments, last comment by Alethea Lin,
Py
706
Unable to remotely retrieve data 1 comment by Jason Mark,
Py
273
Having trouble with stop-loss and take profit when "going short" 1 comment by Jack Simonson,
Py
367
Noob: Struggling to build Lean with MonoDevelop 2 comments, last comment by DaveGilbert,
Py
49
'ForexHolding' object has no attribute 'TotalMargin' 3 comments, last comment by Yiyun Wu,
Py
527
Collaboration 2 comments, last comment by Jack Simonson,
Py
67
AddForex() method is giving me the error "NullReferenceException : Object reference not set to an instance of an object" 3 comments, last comment by Jack Simonson,
Py
1.5k
Novice struggling to use rolling window 1 comment by Frank Norman,
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