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Jared Broad

Founder & CEO

LEAN’s Tear Sheet – The LEAN Report Creator

We’re happy to share that we’ve created a new backtest tear sheet creation tool, which comes with LEAN. The LEAN Report Creator is generated from backtesting-result objects and allows you to quickly create polished, professional-grade reports for each backtest (see a full example report generated by LRC). Our hope is that you can use these […]

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    Stefano Raggi

    Stefano Raggi

    Senior Engineer

    R-Support, Visual Studio Integration, Python Updates – LEAN Release Notes v2.4.0.1

    This release adds R-support to LEAN; allowing you to run R-code from your LEAN C# algorithms. This makes the R statistics libraries available for use in QuantConnect. Additionally a community member contributed a plugin for Visual Studio which uses the QuantConnect API to perform file editing tasks and deploy backtests. Additionally this release extends Python […]

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    Jared Broad

    Founder & CEO

    Python Library Support – LEAN Release Notes v2.4.0.0

    This release adds full python support to enable using common python libraries in your algorithm.It is implemented using the PythonNet library which allows importing C# classes into python and vice versa. The new python algorithms are fully supported in local and cloud trading. There are some minor API adjustments to use the new library but […]

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    Jared Broad

    Founder & CEO

    Tracking and Managing Orders

    Tracking and managing orders flow diagram

    Tracking and managing orders is an important piece of an automated trading strategy. In this video tutorial we demonstrate the QuantConnect API and how to use order management methods in your algorithm.

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    Jared Broad

    Founder & CEO

    Desktop Charting with LEAN

    Desktop charting with LEAN

    With a few configuration changes you can get desktop charting in LEAN with a HTML5 interface very similar to the one you see in QuantConnect.com. This gives you better visual feedback on your strategy and allows you to improve faster. This tutorial guides you through configuring a desktop charting environment with LEAN. Local charting (and […]

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    Jared Broad

    Founder & CEO

    How do I use the API File Provider?

    Ensuring a high data quality is one of the hardest parts of setting reliable backtesting. There are many challenges to ensuring your data is in the right format, free of errors or omissions and historically accurate. We’ve tried to address this for you by opening the LEAN Data Library and letting you download our data. […]

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    Jared Broad

    Founder & CEO

    Free Streaming Live Data with IEX – LEAN Release Notes v2.3.0.3

    This release adds the IEXDataQueueHandler allowing LEAN users to stream free US equity trades to their strategy; along with numerous bug fixes to the OANDA and FXCM brokerage implementations. Additional regression algorithms were added to automate testing of daily data algorithms. The Interactive Brokers connection logic was also made more intelligent to fail quickly when […]

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    Jared Broad

    Founder & CEO

    Generic Data Sourcing and Caching – Release Notes v2.3.0.2

    This release adds a generic data sourcing feature along with abstraction of the data caching. This allows different configurations to be setup independent of physical files. In addition there were dozens ofbugs fixes in LEAN to improve its stability and consistency across backtesting and live trading. There were no breaking changes in regression tests or […]

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    Jared Broad

    Founder & CEO

    Release Notes – LEAN v2.3.0.1

    This release fixed minor bugs in LEAN to improve its stability and consistency across backtesting and live trading. There were no breaking changes in regression tests or the API of LEAN. Features Update AlgoSeek data converter to accept input file mask to only convert specific source files. Added IsAssignable to detect assignment orders in backtesting*. […]

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    Jared Broad

    Founder & CEO

    Release Notes – LEAN v2.3.0.0

    This release made significant changes to the core of LEAN. Options and futures asset classes were added, and the datafeed extended to support their datatype. Hundreds of bugs were fixed and additional converter tools were added to help port the raw data provider files into LEAN format. MorningStar fundamental analysis was also added. This release […]