BTC 4H Volatility Contraction (Bollinger Squeeze) Long-Only Entry with Trend Filter on BTCUSDT.BINANCE

A long-only, single-instrument timing strategy on BTCUSDT.BINANCE perpetual futures that uses VOLATILITY CONTRACTION (the 'Bollinger squeeze' — Bollinger 1992) as the entry gate, with 4H trend confirmation as the regime filter. Structurally distinct from every current portfolio strategy: the promoted ETH+SOL multi-timeframe breakout uses price-channel breaches; my pipelined MultiTimeframePullbackBNBAVAXLong uses price-to-SMA pullbacks; my pipelined BollingerBandMeanReversionWithTrendFilterBTCETH uses statistical price-band reversions; my pipelined BTCVolatilityTargetedLong uses vol for inverse SIZING (continuous). This strategy uses vol for ENTRY TIMING (discrete) — fundamentally different. The mechanism (Engle 1982 ARCH, Bollerslev 1986 GARCH, Bollinger 1992 squeeze, Liu-Tsyvinski-Wu 2022 crypto extension): volatility clusters and exhibits persistence. When realized vol contracts unusually (recent 7-day RV drops below 70% of trailing 30-day RV) WITHIN a confirmed uptrend, the market is in an accumulation/consolidation phase. Historically, this configuration precedes directional continuation as the coiled energy releases. The strategy goes LONG ONLY on this signal (not symmetric short — directional continuation in a confirmed uptrend is structurally asymmetric upward). Exit triggers: vol normalization, trend breakdown, time-based max hold, or fixed ATR stop. Uses ONLY BINANCE USD-M perp 4H + daily bars (proven clean data; no SPOT, no supplementary, no HL, no Deribit). Avoids ALL session failure modes. Fills FOUR critical gaps: (1) NEW MECHANISM CLASS (vol-regime timing, not present in portfolio), (2) MULTI-TIMEFRAME with vol-regime gate (distinct from price-pattern gates), (3) OHLCV-only data dependency (the only reliably-clean type), (4) directly distinct from the BTCVolatilityTargetedLong already in pipeline despite sharing 'volatility' as a theme. Position sizing: 25% of equity on entry; ATR-based trailing stop. Risk per trade: 1.5% of equity capped.