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MetaStock uses Wilder's Smoothing for its ATR smoothing.
Wilder's Smoothing equates to (periods*2-1) exponential smoothing,
Except for some initial values in the first 90 bars or so, MetaStock's
ATR(10) is the same as:
pds:=10;
pds:=pds*2-1;
Mov(ATR(1),pds,E)
For a really, really, really True ATR, I would use Mov(ATR(1),pds,S).
jose '-)
http://www.metastocktools.com
--- In equismetastock@xxxxxxxxxxxxxxx, chichungchoi <no_reply@xxx> wrote:
>
> Does anyone know why Metastock cannot return an accurate ATR(10) value?
>
> [10 TRUE RANGES]
> 424.4297
> 180.4785
> 149.3496
> 544.2793
> 267.6289
> 228.3398
> 221.6406
> 204.0898
> 241.6602
> 241.7188
>
> [Calculating ATR(10)]
> ATR(10) provided by Metastock is 250.631
> ATR(10) provided by Excel is Sum(10 data)/10 = 270.361
> Both results are different, do I use the wrong approach to calculate ATR
> (10) by Excel? or do Metastock return a wrong ATR(10)?
> Does anyone have any suggestions?
> Thank for any suggestions
> Eric
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