SUI Hyperliquid 4H Donchian-Breakout Trend, Long-Short, Regime-Filtered ATR-Trailing (Single-Instrument, 3-Parameter)

Hypothesis

A LONG-SHORT, single-instrument directional TREND strategy on the SUI Hyperliquid perpetual (SUIUSD.HYPERLIQUID), 4H bars. It deliberately targets the two most extreme quota gaps at once: direction (portfolio is 85.9% long_only vs a <=55% target) and venue (HYPERLIQUID is 7.2% vs a >=20% target, and live trading is shifting there). It stays inside the ONE mechanism family that has ever reached paper-stage in this factory -- slow directional trend on a liquid perp -- but expresses it with a DISTINCT, robust, low-parameter Donchian channel-breakout signal rather than the saturated EMA dual-timeframe momentum-confluence template that has repeatedly overfit when ported to new names (LTC/DOT/BNB/LINK/SOL all died overfit). It is deliberately SINGLE-INSTRUMENT to dodge L88 (HL multi-instrument baskets crash backtest_failed) and uses 4H bars so it lives inside HL's ~2.3y of usable 4H history (L: sub-hourly HL dies on insufficient span). SUI is a liquid HL perp with minimal presence in the BTC/ETH/SOL-saturated corpus, spending the data estate rather than re-mining one series.