Bullish Bearish Volume indicator shows with colors:

• Bullish Volume (evidence of the market's strength):
• the Price goes up and the Volume rises (current volume bar is greater than one of the last two) - indicates as green volume bar
• the Price goes down and the Volume rises (current volume bar is greater than one of the last two) - indicates as red volume bar

• Bearish Volume (evidence of the market's weakness):
• the Price goes up or down and the Volume falls (current volume bar is lower than one of the last two) - indicates as pink, thin volume bar

• Yellow line is the moving average of the Volume. You can choose parameters like:
• MA_Period - moving average period
• MA_Type - type of moving average (1 - simple, 2 - exponential, 3 - smoothed)