Hello Chris, Thanks for your efforts for creating the DLL. The DLL is working if we use the formula as given in the example: pds:=Input("Periods",1,99,14); ExtFml( "Wilders.Smoothing", C, pds) However, if we use the following formula, we get error: pds:=If(Cum(1)<14,Cum(1),14); ExtFml( "Wilders.Smoothing", C, pds) ERROR received: "This variable or expression must contain only constant data." Thanks again for providing the DLL. Regards SMG

Chris, It is good, now the DLL accepts the values returned by the formula: pds:=If(Cum(1)<14,Cum(1),14); Values also appear to be same as the native MS Wilder's Smoothing, In the previous version there was slight difference during the initial bars. However, still the plot begins only after the 14th bar. Incidentally the Variable Moving Average functions in the Forum DLL also had the same problem during initial releases. My 13th August post regarding the Forum DLL mentioned the same problem in the MA functions. Although the Trangular Moving Avaerage funtion in the Forum DLL may have some other problems at the moment, however the EMA function seems to be free of the similar problem now. Further, you may want to look into another point that the plot for the above value of 14 starts at the 15th bar; native MS plot begin on the 14th bar, although native Wilder's Smoothing function does not accept values less than 2. It will be wonderful if it is possible that the plot in the DLL version starts at the first bar if needed, just the way it does in the PREV based version. Thanks..... again, Regards SMG

Roy, PREV seems to be more mysterious than expected. Following formula for Wilder's smoothing plots from the first bar and it is same as native Wilder's Smoothing from the 15th bar: pds:=If(Cum(1)<15,Cum(1),15); Wldsm:= PREV+(1/pds*(C-PREV)); Wldsm; Regards, SMG

SMG Interesting stuff, you're right. Yet when the PREV variable is unnamed the plot begins on bar 2. Figure that out. pds:=If(Cum(1)<15,Cum(1),15); PREV+(1/pds*(C-PREV)); Another "interesting" fact is that the plot, whether starting at bar 1, bar 2 or bar 15, is the same as an SMA of 1 to 15 periods. This is what one would expect given that the amount of new data added on each bar up to bar 15 is in direct proportion to the number of bars processed at that point. It also tallies with the notion that Wilders Smoothing starts (or is seeded) at the SMA value of "pds" periods. Roy MetaStock Tips & Tools

Hi, here's the last and I hope final Version for the DLL. The plot starts now from bar one and the plot is identical for all bars >= periods with the original MetaStock version. The name has change from smoothing to WSM: ExtFml( "Wilders.WSM", PriceDataArray, Variable Period) Old version 1.01 is no longer available for download. Enjoy Chris :wink:

Chris, I have come across two small bugs in the DLL, Should I post the details here, if it does not intrude on your time. Regards SMG

Welles Wilder, creator of countless useful T/A indicators, now reduced to selling "the secret of the perfect order underlying all markets" for "not for its original price of $3500, but for $1200". Extract: There you have it. :) jose '-)