Hi smg, Sorry I have been extremely busy with other things, I will try and do some more work on the dll this year for sure though :) Patrick :mrgreen:

Chris, Thanks for offering to help. I am looking for a Wilder's Smoothing function that can accept variable inputs in the period array. The normal MetaStock syntax for it is: Wilders(Dataarray, Periods) It expects only constants in the Period field, something similar to the native Moving Average functions. The advantage Wilder's smoothing has over the Exponential Moving Average function is that it comes to speed twice as fast as the EMA. [color=brown:96c47d31d7]For example the 15 Period WSM is something similar to 30 period EMA {Please see correction below}.[/color] So we need only 15 bars for the plot to begin on the charts. Otherwise, I think it is same as EMA. So I feel it is better to use it in place of EMA. (WSM is similar to EMA, but not exactly the same; hence still using WSM inspite of having variable input EMA in Forum DLL) Further, I wanted to see the plot from the first bar itself. For this purpose I use the following custom indicator: pds:=If(Cum(1)<15,Cum(1),15); Wldsm:= PREV+(1/pds*(C-PREV)); Wldsm (The second line is the RAW formula for the Wilder's Smoothing). Naturally the use of Previous function slows down the calculation. Forum DLL has funtions for various native MS functions with the difference that the period input is not limited to Constants. I am looking forward to have solution to Wilder's smoothing on the same lines. Chris, thanks again for your offer of help. Now, I can look forward to have the solution I have been waiting. Regards SMG [color=green:96c47d31d7]Correction : 15 Period WSM is similar to 29 period EMA (N*2)-1; (15*2)-1[/color]