What does the Clickbank Index actually mean, Does it represent the total amount of sales made, so when the sales drop the index drops and the other way around.. or does it mean something else.. Here's the current index, notice the drop that it is having, which corresponds to the drop in sales that a large amount of affiliates have been having.
If total gravity is decreasing then there have been less overall sales in ClickBank for that given day/time period, etc.