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
During October 2025, Daniel Crowley contributed to the QuantConnect/Lean repository by enhancing trading engine stability and indicator flexibility. He addressed a critical issue in C# where live and paper trading warmup could trigger InvalidOperationException during stock splits, ensuring open orders and historical positions remained accurate. Daniel implemented regression and unit tests to validate these changes, improving reliability for both live trading and backtesting. Additionally, he extended the PivotPointsHighLow indicator with an optional strict parameter, allowing for relaxed comparisons while maintaining backward compatibility. His work demonstrated depth in algorithm development, exception handling, and technical analysis within a robust software design 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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