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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
917
Allow Crypto Shorting in Crypto Universe selection 2 comments, last comment by Chibuike Azubuike,
C#
4k
GDAX Incorrect market data feed n second resolution period.., Second The issue starts from Jan 1st, 2017; and continues until Feb 12th, 2021 2 comments, last comment by QuantConnect Robot,
Py
2.5k
Lean manual universe bar data error with too many symbols 6 comments, last comment by CAPOCAPITAL,
Py
203
MSFT, Daily The issue starts at the start of the data; and continues until Feb 15th, 2022 Started by Tony Huang,
Py
2k
About self.DefaultOrderProperties.TimeInForce = TimeInForce.Day 10 comments, last comment by T C,
Py
358
How shall I use 'alphalens' by python on quant connect? 1 comment by Fred Painchaud,
Py
486
Cash holdings (crypto) not equal to Algorithm holdings (Live trading) 4 comments, last comment by Fred Painchaud,
Py
2k
Runtime Error: ArgumentException: Please subscribe to this symbol before adding a consolidator for it. Symbol: GOOG 3 comments, last comment by T C,
Py
282
When can we reach to current day OHLC during backtesting? 9 comments, last comment by Fred Painchaud,
Py
4.4k
QuantConnect Algorithm Environment 3.0 Beta 7 comments, last comment by Varad Kabade,
Py
268
Stopping Live algo liquidates holdings? 1 comment by Fred Painchaud,
Py
268
Downloading Live strategy holdings? 1 comment by Fred Painchaud,
Py
33
Team plan without add-ons 1 comment by Alexandre Catarino,
Py
268
Notification about an answer in the forum. 1 comment by Vladimir,
Py
1k
Error code with buy orders on security in universe 4 comments, last comment by Fred Painchaud,
Py
358
Can't short on local lean by 'self.SetHoldings' 3 comments, last comment by Fred Painchaud,
Py
2.2k
Trade List of stocks 4 comments, last comment by Newoptionz,
Py
447
Different Backtesting results for same algorithm + not rebalancing every month 2 comments, last comment by Varad Kabade,
Py
2k
Is anyone else having issues with the new coding IDE? 3 comments, last comment by Craig McWilliams,
Py
12.3k
Vectorization in Python 5 comments, last comment by Fred Painchaud,
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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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