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QuantConnect/Lean

Lean

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

View on GitHub↗Upstream QuantConnect/Lean↗

Builder

QuantConnect

QuantConnect

QuantConnect • individual

Stars

19,431

Using upstream star count

Forks

4,833

Using upstream fork count

Open Issues

0

Activity Score

0/100

38 commits in 30d

Created

Nov 28, 2014

Project creation date

README Summary

<picture > <source media="(prefers-color-scheme: dark)" srcset="https://github.com/user-attachments/assets/f3581da5-1983-4f6c-af5a-55c79b37913a"> <source media="(prefers-color-scheme: light)" srcset="https://github.com/user-attachments/assets/0f8022d5-952d-418c-9011-2644830137d2"> <img alt="lean-header" width="100%"> </picture> <br /> <br />

Community Evaluation

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AI Dev Skills

Unmapped

Algorithmic Trading Strategy DevelopmentBacktesting FrameworksFinancial Machine LearningMarket Data ProcessingPortfolio OptimizationQuantitative FinanceRisk ManagementSignal ProcessingStatistical ModelingTime Series Analysis

Tags

Algorithmic Trading Strategy DevelopmentBacktesting FrameworksFinancial Machine LearningMarket Data ProcessingPortfolio OptimizationQuantitative FinanceRisk ManagementSignal ProcessingStatistical ModelingTime Series AnalysisBackendC#CLI ToolCheat SheetData ScienceDockerFinTechForkedOpen SourcePython

Taxonomy

AI Trends

Financial Machine LearningQuantitative AIAutomated Decision Making

category

Dev Tools & AutomationMLOps & InfrastructureLearning ResourcesIndustry: FinTechData Science & Analytics

Deployment Context

Cloud APISelf-hostedOn-premise

Industries

FinTechAsset ManagementHedge FundsInvestment BankingQuantitative Finance

Modalities

TabularTime Series

Skill Areas

Time Series AnalysisStatistical ModelingQuantitative FinanceRisk ManagementPortfolio OptimizationMarket Data ProcessingBacktesting FrameworksFinancial Machine LearningSignal ProcessingAlgorithmic Trading Strategy Development

tag

BackendC#CLI ToolCheat SheetData ScienceDockerFinTechForkedOpen SourcePython

Use Cases

Algorithmic Trading Strategy DevelopmentPortfolio BacktestingRisk ManagementMarket Data AnalysisQuantitative ResearchAutomated Trading ExecutionMulti-Asset Strategy TestingPerformance Attribution Analysis

Recent Activity

Updated 2 months ago

7 Days

3

30 Days

38

90 Days

85

feat: add CreateOAuthTokenHandler factory to Brokerage base class (#9330)

Roman Yavnikov • Mar 14, 2026

541682f

Updates .vscode Environment (#9317)

Alexandre Catarino • Mar 9, 2026

0c4a121

Fix InteractiveBrokersFixModel to reject FOP+Future combo orders (#9323)

JosueNina • Mar 9, 2026

d412fbb

Quality

production
Quality
high
Maturity
production

Categories

Dev Tools & AutomationPrimaryMLOps & InfrastructureLearning ResourcesIndustry: FinTechData Science & AnalyticsFinance & Legal

PM Skills

Scale & ReliabilityData & EvaluationDeveloper Platform

Languages

C#100.0%

Timeline

Project created
Nov 28, 2014
Forked
Mar 13, 2026
Your last push
2 months ago
Upstream last push
18 days ago
Tracked since
Mar 17, 2026

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