USD/JPY ASIAN FX MEAN REVERSION STRATEGY
Built a systematic mean reversion backtest on USD/JPY using a 20-day z-score signal to identify overbought and oversold conditions, validated across 20.5 years of daily OHLCV data spanning two BOJ normalization cycles. Engineered a dual confirmation filter combining realized volatility regime detection and AUD/USD momentum to capture JPY safe-haven dynamics, reducing active trading to 11.2% of days while maintaining a 52.4% hit rate. Measured six model configurations including trend following, time stops, and CFTC overlays, finding that signal simplicity outperformed complexity and producing a four-panel dashboard of entry signals, z-score zones, cumulative returns, and rolling Sharpe.