A delta volume profile is an advanced trading chart tool, It maps the net difference between aggressive buyers (ask volume) and aggressive sellers (bid volume) at every single price level. Unlike a standard volume profile that shows only total volume, a delta profile reveals who is dominating a price zone.

I found this delta volume indicator on trading view and try to convert it into mq4, I am getting errors

Please help me to fix errors

Also I want to plot net delta value shown in dashboard as indicator on chart, please plot delta value similar to macd histogram, positive values above zero and niegtive values below zero line, dashboard shows only current delta value, cant see old delta value.

Delta value supports to detect shift in trend, searched on net but not able to find any mt4 indicator on delta volume profie