The volume-weighted average price (VWAP) is one of the most famous indicators used by traders. BG VWAP not only shows you the VWAP but also allows you to select up to 4 standard deviation bands.
When price moves beyond 1-2 standard deviations away from VWAP it is very likely that price will return to (VWAP).
This makes these standard deviation bands a good spot to be looking for trades.
With BG VWAP you have 4 different standard deviation bands.
Sell Above VWAP
Buy Below VWAP
Green and Red shaded area is Adjustable Range for the VWAP.