ORB15 plots the opening range of the first 15 minutes of the Asia, London, and New York sessions on a 5-minute chart.

Each session is drawn with a high, a midpoint, and a low. A long is marked when a 5-minute candle body closes fully above the range high. A short is marked when the body closes fully below the range low. Wicks are ignored. By default the script allows one signal per session.

Full-session highs and lows, and the previous day’s high and low, are shown as dashed levels. A dashboard lists each range and its status: building, watching, signaled, or no trade.

Intended for index futures such as ES, NQ, MES, and MNQ. Session times, colors, the active window after the range closes, and body-close versus close-only logic are user inputs. Alert conditions are included for long and short.

This is a charting tool, not a trading system. A signal is only a level break on the rules above. It should not be traded on its own, and it does not replace the user’s own judgment, risk limits, or read of the market.