QuantConnect/Lean
Lean Algorithmic Trading Engine by QuantConnect (Python, C#) observed · 2026-08-28
Health v2 · maintenance only
67/100
- Activity 99
- Release rhythm 8
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4296
- days_rel: n/a
- days_push: 7
- n_releases_24m: 0
Adoption not part of the score
21363 stars · 5195 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
LEAN is an open-source, event-driven algorithmic trading engine by QuantConnect supporting backtesting, optimization, and live trading across equities, options, futures, forex, and crypto. It is written in C# with Python support, features a modular pluggable architecture, 100+ technical indicators, and brokerage/data-provider integrations.
Use cases
- backtest a trading strategy on historical market data
- deploy a live trading bot to Interactive Brokers or Binance
- build a quantitative trading algorithm in Python or C#
- optimize strategy parameters before going live
- simulate slippage, fees, and margin for a portfolio
- test options and futures strategies with corporate action handling
When to choose
- you need a professional-grade backtesting and live-trading engine with many brokerage integrations
- you want to write strategies in Python or C# with a large indicator library
- you need multi-asset-class support including options, futures, forex, and crypto
When to avoid
- you only need simple charting or market data analysis without order execution
- you want a lightweight script rather than a full engine with Docker/CLI tooling
- you need a no-code trading platform
Facets
framework · maturity stable
trading simulation sdk cli data-science fintech cross-platform python dotnet cli backtesting live-trading quant technical-indicators brokerage-integration event-driven options forex crypto algorithmic-trading quantitative-finance automation docker
7 sources
- readme: https://github.com/QuantConnect/Lean · fetched 2026-08-28 · 74c4d256c208
- homepage: https://lean.io · fetched 2026-08-29 · b1a049b71022
- site_page: https://www.lean.io/docs/v2/lean-cli · fetched 2026-08-29 · d2788fe843ba
- site_page: https://www.lean.io/docs/v2/lean-cli/key-concepts/getting-started · fetched 2026-08-29 · eefe03b27f4a
- site_page: https://www.lean.io/docs · fetched 2026-08-29 · 73d80ea63b46
- site_page: https://www.lean.io/about · fetched 2026-08-29 · 2273e219ddc8
- site_page: https://www.lean.io/pricing · fetched 2026-08-29 · 2273e219ddc8
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| QuantConnect/Lean | main | 67 |
For agents
markdown · JSON · MCP: product_card(name="QuantConnect/Lean")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem