Expert guidance for systematic backtesting of trading strategies. Use when developing, testing, stress-testing, or validating quantitative trading strategies. Covers "beating ideas to death" methodology, parameter robustness testing, slippage modeling, bias prevention, and interpreting backtest results. Applicable when user asks about backtesting, strategy validation, robustness testing, avoiding overfitting, or systematic trading development.

系统化回测交易策略的专业指导。适用于量化交易策略的开发、测试、压力测试与验证，涵盖“反复锤炼策略”方法论、参数稳健性测试、滑点建模、偏差规避及回测结果解读。适用于用户询问回测、策略验证、稳健性测试、避免过拟合或系统化交易开发时使用。