Here is a volume indicator from the Waddah Attar Explosion family. I have searched high and low and compared many volume indicators. I have come to the conclusion that this one works the best overall out of all the different variations of this same indicator.
Update IMPROVED – VOLUME INDICATOR

https://www.dropbox.com/s/927xykslujr8ggo/waddah_attar_explosion_dlx_v1_0.zip?dl=0
The original volume indicator is specifically called: WAE_Ext
Download it here:
https://www.dropbox.com/s/4r7xj7tehi917hc/WAE_Ext.ex4_.zip?dl=0
This one has some built in customizations. Here are the settings I have received the best results with:
