Wighted Average Price (WAP) Calculation

Hi, Anybody is aware how the WAP and hence the closing price is calculated for Nifty or Banknifty index?

(Closing price is the WAP of last 30 mins).

Explained here

Thank you. This holds good for equity and Futures. Any idea how it’s calculated for indices?

How to find the Predictive closing(any calculator) in the last hour of Banknifty spot index ?

DId you find it ??