QuantConnect

Python and C# algorithmic trading platform

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Lean Lean Public

Lean Algorithmic Trading Engine by QuantConnect (Python, C#)

C# 13.5k 3.9k
lean-cli lean-cli Public

CLI for running the LEAN engine locally and in the cloud

Python 271 144
Research Research Public

Open sourced research notebooks by the QuantConnect team.

Jupyter Notebook 684 194
Documentation Documentation Public

QuantConnect Wiki Style Documentation Behind QuantConnect

HTML 223 178
IBAutomater IBAutomater Public

Automates IB Gateway start, stopping and restarting.

Java 127 56
Tutorials Tutorials Public

Jupyter notebook tutorials from QuantConnect website for Python, Finance and LEAN.

Jupyter Notebook 658 242

Repositories

Documentation Public
QuantConnect Wiki Style Documentation Behind QuantConnect

QuantConnect/Documentation’s past year of commit activity

HTML 223 Apache-2.0 178 37 (1 issue needs help) 0 Updated Dec 2, 2025
Lean.DataSource.FactSet Public
Implementation to the public FactSet Data API.

QuantConnect/Lean.DataSource.FactSet’s past year of commit activity

C# 4 4 0 0 Updated Dec 2, 2025
Lean.Brokerages.Tastytrade Public
Tastytrade Brokerage Implementation

QuantConnect/Lean.Brokerages.Tastytrade’s past year of commit activity

C# 2 2 0 0 Updated Dec 2, 2025
Lean.Brokerages.Alpaca Public
Alpaca Brokerage Implementation

QuantConnect/Lean.Brokerages.Alpaca’s past year of commit activity

C# 10 15 5 0 Updated Dec 2, 2025
Lean.Brokerages.TradeStation Public
TradeStation Brokerage Plugin

QuantConnect/Lean.Brokerages.TradeStation’s past year of commit activity

C# 15 13 6 0 Updated Dec 2, 2025
Lean.DataSource.CoinAPI Public
LEAN CoinAPI Data Source

QuantConnect/Lean.DataSource.CoinAPI’s past year of commit activity

C# 1 Apache-2.0 3 0 0 Updated Dec 2, 2025
Lean.DataSource.AlphaVantage Public
LEAN Alpha Vantage Data Source

QuantConnect/Lean.DataSource.AlphaVantage’s past year of commit activity

C# 8 Apache-2.0 9 0 0 Updated Dec 2, 2025
Lean.DataSource.IQFeed Public
LEAN IQFeed Data Source

QuantConnect/Lean.DataSource.IQFeed’s past year of commit activity

C# 3 7 1 0 Updated Dec 2, 2025
Lean.DataSource.ThetaData Public
Integration with ThetaData for Options History and Live Streaming

QuantConnect/Lean.DataSource.ThetaData’s past year of commit activity

C# 17 Apache-2.0 10 3 0 Updated Dec 2, 2025
Lean.DataSource.Polygon Public
LEAN Polygon Data Source

QuantConnect/Lean.DataSource.Polygon’s past year of commit activity

C# 8 14 1 0 Updated Dec 2, 2025