1). First Feature -
Add the Feature to show multiple standard deviation as per user requirements

As you can see in the photo how they show different standard deviation for VWAP.
I Hope u can find the formula at your end,
these are the sources about how it looks when Bands are applied
The Detailed Guide to VWAP – TheVWAP
VWAP indicator and adding associated standard deviations by James Hawkins - QuantConnect.com
2). Second Feature-
to have one Main Vwap and Multiple Reset Vwap -
What i mean is as of today 9-11-2023. in Bookmap what happens is If I rest my Vwap, I will loose my main Vwap and i will have my reset values. What i want is an option to have Both on my charts.
these two features will be helpful to traders who wants top trade reversal and other strategies based on these concepts