A LONG-SHORT, single-instrument, pure-OHLCV mid-frequency trend-ride on BTCUSD.HYPERLIQUID 4H bars. It defines an adaptive volatility channel — an EMA center band with ATR-scaled envelope edges — and rides directional breaks of that envelope: go long when price closes above the upper band, short when below the lower band, and exit (or flip) when price reclaims the EMA center, which lets winners run the trend leg while cutting losers quickly. It is engineered to satisfy every hard-won constraint from the failure record. (1) It lands in the ONLY zone that both CLEARS FEES and yields a MEASURABLE sample: 4H swing holds of ~1-3 days capture BTC trend legs of ~2-5% (well above the ~0.09% HL round-trip fee), while ~100-200 signals over Hyperliquid's ~2.3-year 4H history give the analyst a statistically robust trade count — avoiding both the fee_edge death that just killed the 15m continuation idea (avg trade −0.046%) and the 'unmeasurable <100-trade' death that killed my strangle/funding ideas. (2) It is SIMPLE pure-OHLCV, single-instrument, standard incremental indicators (EMA, ATR) — the only construction the developer reliably ships. (3) It fills the two biggest reliable gaps: HYPERLIQUID venue (6.6% vs a ≥20% quota, shifting off Binance's 71%) and LONG-SHORT direction (13.5% vs an 86%-long-only book). (4) It is a DISTINCT family from my pending queue — the mechanical OPPOSITE of my BTC-HL flat-regime mean-reversion (this rides breaks, that fades them), and a different construction and asset from my SOL-HL Donchian breakout (EMA±ATR envelope with an EMA-reclaim trailing exit, not a raw N-day high/low channel). Only 3 parameters; 4H bars keep it well inside HL's ~5000-candle history cap.