Trade Volume Index   

The Trade Volume Index (TVI) shows whether an instrument is being accumulated (purchased) or distributed (sold).
Usage:
The TVI helps identify whether buyers or sellers are in control. If the TVI is trending up, it indicates that buyers are in control. If the TVI is trending down, it indicates that sellers are in control.  If the TVI is above zero, it indicates that net buying has taken place over the time period displayed. If the TVI is below zero, it indicates that net selling has taken place over the time period displayed