gail
Ihub's help seems to represent green volume as being volume at the ask. should be a good thing in my estimation. buying at the ask should be best form of buying.
Volume
The Volume study displays the Volume of trades in a separate chart below, the main chart. The height of the bar is the total volume, the volume of units traded at the asking price, the buy volume, is plotted in green. The volume of units traded at the selling price, the sell volume, is plotted in red. All the other trades are plotted in blue.
trade