RIOT is seeing a sharp increase in call open interest at the $18 strike for Nov. 20, pointing to concentrated options positioning. Lia Holmgren said TMAD App he

RIOT is seeing a sharp increase in call open interest at the $18 strike for Nov. 20, pointing to concentrated options positioning. Lia Holmgren said TMAD App heatmaps show market makers hedging around that level, which may also mark resistance.