Backtest Expert - Strategy Validation

This skill appears coherent and non-malicious: it provides methodology docs and a local backtest-evaluation script. Before using it, do the following: (1) Review and run the unit tests in an isolated/sandboxed environment — the tests import and execute the Python file, so run them in a controlled environment. (2) Inspect/fix the small implementation bug in scripts/evaluate_backtest.py (the returned dict references calc_profit_fact but the function is named calc_profit_factor), which will cause runtime errors. (3) Confirm you provide your own historical data (the package states it does not include or fetch data). (4) If you plan to use or link the separate einstein-research-backtest-engine referenced in SKILL.md, verify that engine's provenance before connecting it. (5) As with any third-party code, avoid running it on sensitive systems or with production credentials; run preliminary checks in a throwaway VM or container.