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Given that Tomasz *HAS* documented (see
http://www.amibroker.com/guide/afl/afl_view.php?name=DEMA)
DEMA(c,20) as being equivelant to
Len = 20;
Factor = 2/(Len+1);
e1 = AMA( Close, Factor );
e2 = AMA( e1, Factor );
Plot( DEMA( Close, Len ), "Built-in DEMA", colorRed );
Plot( 2*e1 - e2, "AMA-implemened DEMA", colorBlue );
5 minutes with google, I find
http://www.tradestationworld.com/EL_library/studies/tema.shtm, and a few
minutes more with AB, gives
Len = 20;
Factor = 2/(Len+1);
e1 = AMA( Close, Factor );
e2 = AMA( e1, Factor );
e3 = AMA( e2, Factor );
Plot( TEMA( Close, Len ), "Built-in TEMA", colorRed );
Plot( 3*e1 - 3*e2 + e3, "AMA-implemened TEMA", colorBlue );
Not a very Black box.
I think you will find that most of the functions that Tomasz has put in
AmiBroker are standard ones from the trading literature (eg TA S&C).
Nigel
On Thu, 10 Jul 2003 03:06 pm, Fred wrote:
> Steve,
>
> To some degree this is nonsense when it comes to the functions of
> ABTool. Unless you have looked at all the C++ code that Tomasz has
> written the indicators therein are to a large extent as much of black
> box as the functions in ABTool. Do you know what TEMA does ? or half
> the other things in the list ?
>
- --
Nigel Rowe
rho@xxxxxxxxxxx
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