The opening range is the highest and lowest price ES/NQ makes during the first 15 minutes of the New York cash session, 9:30 to 9:45 ET. Draw a box around that half hour and you have the range: a high, a low, and everything between. Every trading day has one, and it is the day's first verdict on where value sits.
For education only. Nothing here is financial advice, and trading involves risk.