Volume ROC
The Volume ROC is a technical analysis indicator used to measure the volatility of the volumes of a financial instrument. The Volume ROC is calculated in the same way as the ROC and differs from this only because the calculation is made on the volume rather than on the price of the financial instrument. The Volume ROC is calculated by dividing the volume of the last “x” periods by the volume of the last “X” periods ago. If today’s volume is less than “x” periods ago, the ROC Volume is negative.