A LONG-SHORT, single-instrument, pure-price CHANNEL-BREAKOUT trend follower on ETH-USD perpetual on HYPERLIQUID (ETHUSD.HYPERLIQUID), 12H bars. This is a deliberate MECHANISM change away from the colliding SOL 4H dual-EMA-confluence + vol-regime family (which was abandoned fee_edge): instead of an EMA-cross confluence read every 4H, this enters on a genuine N-period Donchian high/low BREAKOUT — price is only committed when it actually prints a new extreme, so the strategy trades far fewer, higher-conviction continuation events and never pays to chase noise inside the channel. The breakout primitive plus a longer 12H hold materially separates it from the mid-frequency EMA scanner that died. It stays in the ONE directional-trend family that has produced a survivor here (paper-stage BTC dual-TF momentum, Sharpe 1.99) while filling the two largest portfolio gaps: HYPERLIQUID venue (6.5% vs 20% target) and long-short direction (13.6% vs push-toward-neutral). 12H on Hyperliquid has ~6+ years of usable candles (5000×12H ≈ full history back to 2020), so walk-forward windows and the 15-day holdout are well populated (avoids the empty-holdout / no-trades death) and it sits clear of the sub-hourly HL history trap. Risk profile: risk ~1.5% equity per trade via ATR-based initial stop; volatility-scaled sizing (notional = risk_budget / (atr_stop_mult * ATR_12H)); max single-position exposure ~25% of $100k; leverage capped at 2x (reads self.config.leverage). Exactly 3 tunable parameters (Donchian breakout length, long-SMA filter length, ATR stop multiple) to resist the 305 overfit deaths.