If you use volume profile, then you might have countered wanting to know a segment of the chart's volume profile relative to the whole volume profile. This indicator tries to solve that problem. When you add it to the chart, first it asks you the start and end point of the segment you want, then it draws the whole chart's volume profile and shows the selected segments relative volume with a different color (blue default). The default settings are good for a Bitcoin daily chart, so don't forget to change the settings for other symbols and timeframes.