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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
311
Size of FXCM tick data Started by Hew Kok Wooi,
64
Is this algorithm profitable? 3 comments, last comment by Alexandre Catarino,
Py
STAFF
Temporary Backtesting Disruption - 28th February, 2017 1 comment by Jared Broad,
C#
1.4k
Looking for Someone to Build Simple Custom Indicators (Willing to Pay) 1 comment by Josh Morris,
Py
43
Algo market order 5 comments, last comment by Alexandre Catarino,
C#
333
All Markets are Closed 2 comments, last comment by Benton Pena,
Nasdaq Ticker Strings? 1 comment by Alexandre Catarino,
C#
166
Quote or Trade as suffix of dowloaded data file names 2 comments, last comment by Aabos,
Py
10.5k
Maximum size of market orders before experiencing major slippage in SPY? 4 comments, last comment by Petter Hansson,
C#
368
How to preserve my settings config.json when upstream version change? 2 comments, last comment by Jared Broad,
64
Is historical most profitable trade book worthy? 2 comments, last comment by Moataz,
C#
471
Questions for simple stochastic algo 12 comments, last comment by Jean-François Garino,
C#
367
Just downloaded LEAN, have a few questions 16 comments, last comment by Jared Broad,
Py
9
C++ execution code 1 comment by Alexandre Catarino,
Py
10.5k
Number of Tick:s sent to OnData 2 comments, last comment by Petter Hansson,
223
Unable to retrieve share price 4 comments, last comment by Alexandre Catarino,
Py
STAFF
Daily & Hourly Data Maintenance Started by Jared Broad,
Py
10.5k
Periodic callback possible? 4 comments, last comment by Petter Hansson,
C#
367
Tips for quicker backtests in LEAN? 6 comments, last comment by JayJayD,
Py
691
Optimization of an algorithm parameters 5 comments, last comment by Douglas Stridsberg,
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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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