ETH Hyperliquid Daily 50-EMA Pullback Long with 200-SMA Bull Regime Filter

A long-only single-instrument PULLBACK-IN-UPTREND strategy on ETH perpetual futures on the HYPERLIQUID exchange (DEX-based perp protocol) using daily bars and OHLCV-only data. This proposal targets TWO portfolio gaps simultaneously: (1) HYPERLIQUID VENUE COVERAGE — no in-pipeline ETH strategy uses Hyperliquid; my just-added BtcHyperliquidDailySimpleTrendFollowingLong is the only HL exposure; adding ETH on HL diversifies both venue and asset; (2) PULLBACK-IN-TREND ENTRY MECHANISM — every existing trend strategy in the portfolio uses TREND-CROSS ENTRY (Golden Cross: buy when 50-EMA crosses 200-EMA; HH/HL: buy on positional breakout; Vol Breakout: buy on Donchian high break; Three White Soldiers: buy on momentum confirmation). NONE buy the pullback-DURING-trend (entering on temporary weakness rather than confirmed strength). The pullback-in-trend mechanism is mechanistically orthogonal: trend-cross entries fire at REGIME-CHANGE moments (rare, late); pullback entries fire DURING established trends at temporary support tests (frequent, dynamic). Linda Raschke documented the 'Anti' trade in 'Street Smarts' (1996) and Larry Connors extensively researched pullback-in-uptrend setups across asset classes. The economic mechanism is well-established: in a confirmed uptrend (price > 200-SMA AND 50-EMA rising), temporary pullbacks to the 50-EMA represent (a) profit-taking by short-term traders that exhausts at the structural moving average, (b) accumulation opportunity for trend-following systematic capital that uses the EMA as a re-entry trigger, (c) trapped shorts who entered at the recent peak now under water. Hyperliquid is chosen specifically because (a) the persistent Binance auditor failure (~20 hours) has prevented every Binance strategy from passing Layer 3 — Hyperliquid uses HyperliquidCollector with separate API path that may bypass this failure entirely; (b) ETH has deep liquidity on Hyperliquid (top-2 perp by HL volume), with ~2-2.5 years of data sufficient for backtest; (c) Hyperliquid lower fees (~0.09% RT vs Binance 0.10%) provide marginal but real edge; (d) Hyperliquid's DEX-driven flow may produce cleaner pullback dynamics than Binance's CEX market-maker quoting. Only 4 explicit parameters (regime SMA period, pullback EMA period, pullback proximity threshold, stop-loss pct) — minimum-parameter strategy.