Sometimes abbreviated as PVO.

Is a momentum indicator.

Is computed using the volume.

Returns two time series. The first is the percent difference between 9- and 16-period simple moving averages, and the second is a signal line represented as a 9-period exponential moving average of the first.

FinancialIndicator["PercentageVolumeOscillator",n₁,n₂,n₃] uses periods n₁ and n₂ for the first series and period n₃ for the second.