SOL Idiosyncratic Mean-Reversion, BTC-Beta-Hedged Market-Neutral Pair (SOLUSDT.BINANCE hedged with BTCUSDT.BINANCE, USD-M — SHORT SOL / LONG beta-scaled BTC When SOL Idiosyncratically OVERSHOOTS Its Beta-Implied Path by a Wide Margin, Reverse on Undershoot, Exit on Residual Convergence; 3-Parameter)

A MARKET-NEUTRAL, TWO-INSTRUMENT relative-value strategy that trades the IDIOSYNCRATIC (beta-residual) component of SOLUSDT.BINANCE while hedging market risk with a beta-scaled BTCUSDT.BINANCE leg. Continuously estimate SOL's beta to BTC and compute SOL's residual = SOL cumulative return − beta × BTC cumulative return over a short window. When SOL idiosyncratically OVERSHOOTS (residual >> 0), SHORT SOL + LONG beta-scaled BTC (net market beta ≈ 0); when it UNDERSHOOTS (residual << 0), LONG SOL + SHORT beta-scaled BTC; exit when the residual converges back toward zero. This is deliberately the FIX for why single-name mean-reversion fades are 0/174 dead (L53): those fade a raw price stretch that is mostly MARKET noise smaller than the round-trip cost, so the reversion target is sub-fee. Here the BTC hedge REMOVES the market component, leaving the larger, genuinely mean-reverting IDIOSYNCRATIC overshoot (SOL routinely dislocates 1–3% from its beta-implied path on flow/news, then re-converges), and the strategy only triggers when that residual dislocation is wide enough that the expected convergence exceeds 3× the two-leg round trip. The edge is DISTRIBUTED across many independent dislocation events (not concentrated in a few outlier days), so it structurally survives the outlier-removal test that killed every single-name trend idea. It is materially different from every collision/dead family: NOT single-name directional trend (0/213 outlier mirage — this is market-neutral, direction-hedged), NOT a raw single-name fade (L53 — beta-hedged, isolates idiosyncratic residual, wide-dislocation-only), NOT a cross-sectional RANK basket (both cross-sectional momentum and cross-sectional funding carry are abandoned — this is a single named target with a single hedge, event-triggered, no ranking), NOT my pending cross-sectional short-term reversal (that ranks a whole basket on raw return; this is one instrument's beta-RESIDUAL, event-driven), NOT funding carry / basis / microstructure / options. Fills the under-represented long-short/market-neutral bucket with a simple, reliably-backtestable 2-perp structure.