Volume Scale by Price (VSP) show volume of bar in y-axis (price-axis) with options below:
1. Number of histogram
* Number of histogram = 0 => do not plot volume histogram
* Number of histogram = 1 => plot volume of 21 lasted bar (bar [0] to bar [20])
* Number of histogram = 2 => plot volume of 21 bar next histogram 1 (bar [20] to bar [40])
2. Line width
* Columns width of histogram
3. Volume scale ratio
* Scaling histogram with justifiable ratio depend on time frame and symbol
4. Histogram color
* Color of histogram