What Is the Cumulative Volume Index (CVI)?

The cumulative volume index, or CVI, is a momentum indicator that calculates the difference between advancing and falling equities to provide a running total.
​CVI=PPCVI+(Advancing Stocks−Declining Stocks)
PPCVI=Prior Period’s CVI
Advancing Stocks=Number of advancing stocks in current period
Declining Stocks=Number of declining stocks in current period​