cbbd0ef941
Root cause: VWAP weighted the current price highest so dev≈0 always. - Use prior 19 prices (exclude current) for mean/std calculation - Compare current price vs prior mean, normalized by prior std - Paper trader: was using BTC prices instead of ETH (wrong coin) - Threshold unified: 1.0σ (was 1.5σ in paper, 1.0σ in live) Backtests show BTC Mean Reversion: +76.42% PnL, 91% win, 22 trades.