Effective Volume (Willain)

This is the Effective Volume using the Average Separation Method
Excerpt:
The most obvious way to separate Large from Small Effective Volume is to calculate the per-minute average Effective Volume exchanged for all the
minutes of the day where a price inflection was found. The volume above that average is called Large Effective Volume (pg. 67)

Looks at the Close(n) to Close(n-1)/h-c*vol and registers it if its above 30% of total volume.