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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
604
Runtime Error Backtesting... 2 comments, last comment by Jared Broad,
Py
1.7k
Is it possible to request the most recent price of a securitty without having it in your list of added securities? 3 comments, last comment by Varad Kabade,
Py
297
Indicator extension does not work with MOMP 4 comments, last comment by Vladimir,
Py
139
How shall I do if I want to trade a big volume on quantconnect? 1 comment by Louis Szeto,
Py
447
Tqqq, Minute The issue starts from Nov 22nd, 2021; and continues until Jan 13th, 2022 2 comments, last comment by Nodeflow GmbH,
Py
2.2k
Problem with Debug Time to prevent day trades 6 comments, last comment by Adam W,
Py
7.9k
Simple pair trading framework Started by AlphAngel,
Py
2.3k
IYT, Daily The issue starts from Jan 1st, 2007; and continues until Jan 1st, 2020 2 comments, last comment by QuantConnect Robot,
Py
146
Failed to sync project with cloud for backtest 10 comments, last comment by Alexandre Catarino,
Py
532
Split Adjusted Data 1 comment by Vladimir,
Py
5.5k
Code no longer placing orders/ QC bug 1 comment by AegeanFutures,
Py
158
Python match keyword syntax error 1 comment by Spencer Wasden,
Py
2k
Warning: start date will be adjusted (on history requests) 1 comment by Varad Kabade,
Py
440
QQQ, Minute The issue starts from Dec 1st, 2004; and continues until Mar 22nd, 2011 3 comments, last comment by Ruichao Wang,
Py
146
BRK.B, Minute The issue starts from Jan 31st, 2007 09:31 AM; and continues until now 2 comments, last comment by Alexandre Catarino,
Py
1k
How does "self.portfolio" function in Live mode when my account is holding stocks before I start Live mode? 1 comment by Varad Kabade,
Py
231
Why are 0 data points being processed here? 1 comment by Adam W,
Py
545
Adding Custom local data via ManualUniverseSelectionModel in LEAN local 2 comments, last comment by Louis Szeto,
Py
526
WORK, Daily The issue starts from Jun 2nd, 2019; and continues until Jul 21st, 2021 Started by KevinW,
Py
1.6k
Implement QCAlgorithm.Quit() 2 comments, last comment by Joe F,
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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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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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