Sometimes abbreviated PFE.

Is a trend indicator.

Is computed using close prices.

Returns one time series, which is a 10-period moving average of the ratio of the mean-square-root of net change to the total change over 5 periods.

FinancialIndicator["PolarizedFractalEfficiency",n₁,n₂] uses an n₁-period moving average of ratios over n₂ periods.