Resistance of Volume

It is used to detect volume resistors in a personalized way, since it allows the user to enter the volume in which he wishes the resistance to jump automatically.
It does not mark the black line and the graphic that's just to help understand how it works

in the above image can see the indicator works on 30 minutes chart

in the above image can see the indicator works on 5 minutes chart
therefore, it can be configured to go through several temporalities.