This indicator helps you defining your max sizing, depending on the max $$$ amount you're willing to risk against a specific exponential moving average (or VWAP, default is the 13ema).
You can define your max risk amount and your max allowed sizing. The indicator would suggest the best sizing in order to risk only up to the amount you are comfortable with on a potential trade.
Moreover, the column bar would turn yellow/red if the divergence is above a certain threshold (default are yellow > 1.50% and red > 2.75%, green otherwise).