Here is my take.
It uses GG’s Gadi_NormalizedVolume_v2.2 for volume information.
The indicator paints bars according to GG’s rule.
The direction of the bar is given by the direction of the candle.
The size of the bar is calculated based on the volume change and inverted candle’s range change meaning: the bigger the volume and smaller the range the bigger the indicator bar. If you don’t like this logic, you can turn it off in inputs. I just thought it might show the power of the change.
Thanks @GG53 for another tip. I’ll try to incorporate it into my FractalArrow indi.