Volume Density

A group of two indicators:
The "Volume Density" shows how much volume was thrown out relative to the covered price range.
The "Volume Density Bars" shows the same, but with colour on top of the bar chart.

Notes de version:

Merge with "Volume Density Bars" by adding option to colourize bars and disable histogram.

Notes de version:

Add option to select a moving average function

Notes de version:

Add clip value setting to clip spikes of high volume

Notes de version:

Fix priveiw image

Notes de version:

Fix "Invalid symbol" warning when the custom volume source is enabled.