AVWAP needed - anchored volume weighted average price

Hello, that's the only indicator I use actually. I just started to use this online forex tester. I realize that the chart software is similar with trading view. At least the GUI looks like. I hoped to find the AVWAP, but unfortunately there is no anchored AVWAP tool. My whole backtesting is based on this, otherwise I feel no use in using this software unfortunately.

You click on AVWAP tool and then choose the bar you want to start your vwap. Instead of continiously calculation. It starts whereever you want to start