I was playing with some AMA formula, trying to get my head around how Perry Kaufman came up with his Adaptive Moving Average. I started editing the code to make it more succinct and run faster on my P.O.C. computer. I also took out his weightings as they didn't seem logical to me, and I couldn't identify how he arrived at the settings he did (and IMHO it works better without it!) What I came up with is this: {Mod. Kaufman's Adaptive Moving Average} {by wabbit} prd:=Input("Time Periods",1,1000, 31); K:=Power(ROC(CLOSE,prd,$)/Sum(Abs(ROC(CLOSE,1,$)),prd),2); AMA:=If(Cum(1)=prd+1,C,PREV*(1-K)+C*K); AMA; Anyway, I was thinking about the seeding problem (see other threads on this forum for seeding definitions and problems - just do a search). I tried to use a seed: AMA:=If(Cum(1) <= prd+1,C,PREV*(1-K)+C*K); {note the less than symbol} to say, in the first "prd" bars of the induicator return the CLOSE price. Once the formula gets to the "prd+1"th bar then carry on using the close of the "prd"th bar as the seed. This returns N/A in the first "prd" bars, and the CLOSE on the "prd+1"th bar?? BUT I have clearly stated that in the first "prd" bars, just return the close? Can't seem to get my head around this?? What say you Patrick, Jose, anyone? wabbit :D

I like your simplified version, it's almost the same and you got rid of some extra code :D I do agree, it seems that the smoothing code is almost useless ... I wonder why that was done like this :-k Patrick :mrgreen: