QuantConnect/Lean
Oct 2025 – Oct 2025
1 Month active
Languages Used
C#CSharp
Technical Skills
Algorithm DevelopmentBacktestingC#Exception HandlingIndicator DevelopmentRegression Testing
Ryan Crowley
PROFILE
Ryan Crowley
Contributed to QuantConnect/Lean by enhancing trading engine stability and indicator flexibility using C# and robust software design practices. Addressed a critical issue where live and paper trading warmup could trigger InvalidOperationException during stock splits, ensuring open orders and historical positions remained accurate and unaffected. Developed regression and unit tests to validate these changes and prevent future regressions. Expanded the PivotPointsHighLow indicator with an optional strict parameter, allowing for relaxed comparisons while maintaining backward compatibility. Focused on algorithm development, technical analysis, and comprehensive test coverage, these improvements increased reliability for both live trading and backtesting scenarios within the Lean framework.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
2Total
Bugs
1
Commits
2
Features
1
Lines of code
535
Activity Months1
Work History
October 2025
2 Commits • 1 Features
Oct 1, 2025October 2025: Lean stability and indicator enhancements delivered for QuantConnect/Lean, focusing on business value and technical robustness. Implemented a critical warmup fix to ensure live/paper trading proceeds without InvalidOperationException when stock splits occur, preserving open orders and historical positions, with regression tests. Added flexible PivotPointsHighLow indicator capability (optional strict parameter for relaxed comparisons) while maintaining backward compatibility and accompanying unit tests. These changes improve reliability for live trading and backtesting, expand indicator functionality, and strengthen test coverage.
2 Commits • 1 Features
Oct 1, 2025October 2025: Lean stability and indicator enhancements delivered for QuantConnect/Lean, focusing on business value and technical robustness. Implemented a critical warmup fix to ensure live/paper trading proceeds without InvalidOperationException when stock splits occur, preserving open orders and historical positions, with regression tests. Added flexible PivotPointsHighLow indicator capability (optional strict parameter for relaxed comparisons) while maintaining backward compatibility and accompanying unit tests. These changes improve reliability for live trading and backtesting, expand indicator functionality, and strengthen test coverage.
October 2025
Activity
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Quality Metrics
Correctness100.0%
Maintainability90.0%
Architecture90.0%
Performance90.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C#CSharp
Technical Skills
Algorithm DevelopmentBacktestingC#Exception HandlingIndicator DevelopmentRegression TestingSoftware DesignTechnical AnalysisUnit Testing
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