Polarized fractal efficiency

Polarized fractal efficiency
In January 1994 The issue of supplies and goods featured an article by Hans Hannula on polarized fractal efficiency. Here is a custom formula for creating a five-period smoothed 10-day PFE using MetaStock:
Mov (If (C> Ref (C, -9), Sqr (Pwr (Roc (C, 9, $), 2) + Pwr (10,2)) /
Sum (Sqr (Pwr (Roc (C, 1, $), 2) 1), 9), -
Sqr (Pwr (Roc (C, 9, $), 2) + Pwr (10,2)) /
Sum (Sqr (Pwr (Roc (C, 1, $), 2) 1), 9)) * 100.5, E)