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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
22
LEAN Docker container on another machine 1 comment by Fred Painchaud,
C#
3.1k
One .CS project when copied locally shows empty in VisualStudio 2 comments, last comment by David Thielen,
Py
351
Current Price 1 comment by .ekz.,
Py
4.3k
IBKR margin account buying power 8 comments, last comment by Li Cheng,
C#
542
[Question] How do I access Yield Curve and Vol surface data in strategy? 1 comment by Varad Kabade,
Py
434
History Fails 2 comments, last comment by Andre Meeusen,
Py
2.3k
Risk management doesn't seem to be limiting drawdown to specified max percentage. 5 comments, last comment by Lucas ,
Py
57
Centralized Execution 6 comments, last comment by Alexandre Catarino,
Py
73
Looking for options collaborators to work on machine learning 8 comments, last comment by Cole S,
Py
37.4k
Futures: Consolidate minute resolution into daily resolution based on trading hours 1 comment by Xinmin Cai,
Py
12.3k
Custom data: returning TradeBar instead of custom class object 1 comment by Fred Painchaud,
Py
233
Existing Session with IB Broker 2 comments, last comment by Alexandre Catarino,
Py
1.6k
QC500 and SP500 historical constituents lead to dramatically different results. 5 comments, last comment by Derek Melchin,
Py
73
Looking for people who are interested in collaborating to make an options trading bot 1 comment by .ekz.,
Py
1.3k
Pass information from aphla model to log at the end of the algorthim 1 comment by Fred Painchaud,
Py
32
Running lean research in VSCode and in debug mode 1 comment by Fred Painchaud,
Py
135
LiquidETF Universe 2 comments, last comment by Vince,
Py
2.6k
QUANDL dataset vs FRED dataset 5 comments, last comment by Frank Giardina,
Py
5.5k
Using custom continuous future contract in LEAN 1 comment by Alexandre Catarino,
Py
1.1k
Tick Size and Values 1 comment by Mak K,
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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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