Initial Balance - NSE India

Initial Balance for NSE intraday charts.

Default window is 09:15-10:15 IST (first 60 minutes of the regular session).

Tracks the running high/low inside the window, locks them when it closes, then plots the midpoint and range extensions for the rest of the session.

hour and minute follow the CHART timezone, not the exchange. If the chart is not on Asia/Kolkata, change the start hour/minute inputs, not the code.

Use an interval that divides the window evenly: 1, 3, 5, 15 or 30 minutes.