inputs:
	Price( numericseries ),
	Length( numericsimple ) ; { this input assumed to be a constant >= 1 }

variables:
	SmoothingFactor( 2 / ( Length + 1 ) ) ;

if CurrentBar = 1 then
	PZXAverage = Price
else
	PZXAverage = PZXAverage[1] + SmoothingFactor * ( Price - PZXAverage[1] ) ;