Gap
Hourly closes for the token come from Jupiter's chart service; hourly closes for the commodity come from Hyperliquid perp candles. We join them on the hour. When a token states a fixed claim (one PAXG is one troy ounce), the gap is token ÷ (units × mark) − 1. When the claim drifts, as with a fund share, we use the window's median ratio as the implied claim and call the result tracking drift.