Multi-regime options spread analysis engine with quantitative rigor. Features regime detection (VIX-based), GARCH volatility forecasting, drawdown-constrained Kelly position sizing, and walk-forward backtesting. Scores vertical spreads (bull put, bear call, bull call, bear put) and multi-leg strategies (iron condors, butterflies, calendar spreads) using Ichimoku, RSI, MACD, Bollinger Bands, and IV term structure analysis.

具备量化严谨性的多市场 regime 价差分析引擎，支持基于 VIX 的 regime 检测、GARCH 波动率预测、受回撤约束的凯利仓位管理及向前滚动回测。通过 Ichimoku、RSI、MACD、布林带和隐含波动率期限结构分析，对垂直价差（牛市看涨、熊市看跌、牛市看跌、熊市看涨）及多腿策略（铁鹰、蝶式、日历价差）进行评分。