I use options express and can add VWAP to my ES chart.
It is preset to period 20 but I can change this.
What is the period that is generally used by traders such as Futures Trader 71.
Also, I have it set to compute on closing price - OK?
I can also set an offset and band basis 1 and 2 (these are defaulted to zero.
Thanks for your comments...
Bill C.

Last time I looked which was a while back he was using the realtime closing value of VWAP. Just the day session.