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Volume Rate of Change (ROCV)
Volume Rate of Change (ROCV) is indicator in technical analysis which is used to confirm price moves. ROCV works identical like rate of change (ROC), just it is applied to volume.
Volume rate of change is calculated by formula:
For n parameter is usually used value of 12.
Volume Rate of Change (ROCV)
Interpretation
ROCV measures speed of volume change, which is important for other indicators and technical analysis in general, because every event (trend reversal, trend start etc) must be confirmed by volume.
Example
Open chart for google with volume rate of change indicator.