Dealer gamma exposure — free

Net dealer gamma by strike, computed from listed options and refreshed intraday. Above the gamma flip dealers hedge against moves (dampening); below it they hedge with moves (amplifying). The call wall and put wall are the strikes with the heaviest hedging weight — price tends to slow near them. Free, no key, no signup: GET /api/gex.

GEX is a map, not a forecast. It shows where hedging flows sit today; it does not know tomorrow. People lose money trading against maps they misread — terms.