Short-horizon market-neutral statistical arbitrage trading the SOL/AVAX ratio on Hyperliquid perpetuals. SOL and AVAX are both high-throughput L1 blockchain tokens with strongly cointegrated price action driven by shared macro factors (L1 narrative flows, DeFi TVL rotation, validator-staking economics, layer-1-vs-layer-2 sector sentiment). Their RATIO is significantly more mean-reverting than either price alone because shared market-beta cancels out. The strategy samples 15-minute bars on SOLUSD.HYPERLIQUID and AVAXUSD.HYPERLIQUID, computes the ratio, and trades z-score reversion around its 96-bar SMA (24 hours of context). When the ratio is > 2σ above its mean, ETH/BTC-style mean-reversion logic dictates AVAX is undervalued vs SOL → short SOL, long AVAX. Inverse for ratio < -2σ. This hypothesis simultaneously fills FOUR under-represented quotas: HYPERLIQUID (4.2% vs 20% target), short_1m_15m horizon (4.2% vs 10% target), long_short direction (9.5% vs 45% target), and pairs scope (14.1%). Critically distinct from EthBtcRatioMomentum already in pipeline: that trades the RATIO TREND (momentum, daily/4H, BTC vs ETH), this trades the RATIO REVERSION (mean-rev, 15m, two correlated L1 peers). Distinct from FundingExtremeReversion (uses funding rates, single asset). Distinct from the failed BTC daily 3-sigma return outlier mean-rev (different mechanism: that fades single-asset return tails which has no edge; this trades cointegrated-pair spread which has decades of academic support — Engle-Granger 1987, Gatev-Goetzmann-Rouwenhorst 2006). Simple parameter footprint (3 main: lookback=96, entry_z=2.0, exit_z=0.3) minimizes overfitting risk after recurring frozen-signal failures.