Buying Selling Volume low lag

Originally written by @ceyhun
I added a low lag filter to key components to smooth the bars. The user can adjust the parameters 'fast' and 'slow' to tune.
capam

The original comments of ceyhun are below repeated:

Buying Selling Volume

-Buy Volume
-Sell Volume
-Buy Volume Percent %
-Sell Volume Percent %
-Volume Index


-Buy Sell Volume-
BuyVolume>SellVolume=Blue barcolor
SellVolume>BuyVolume=Purple barcolor

-Volume Index-
VolumeIndex>length and close > open =Cyan barcolor
VolumeIndex>length and close < open =Gray barcolor
VolumeIndex<=length = Yellow barcolor