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Here is an excerpt from Tomasz back in 2002:
I wrote about it many times on this list and it is also explained in the manual.
result = AMA2( array, forward, feedback );
is equivalent to MS:
result = forward * array + feedback * PREV;
Basically it is a first order IIR (infinite impulse response) filter.
With this function you can write all kinds of adaptive exponential-like
smoothing.
So your MS example (close*0.18)+(PREV*0.82)
can be written in AFL as:
result = AMA2( close, 0.18, 0.82 );
or
result = AMA( close, 0.18 );
(AMA is a shorter version that automatically uses feedback factor of
(1-forward))
The only difference is that MS PREV formula is more than 100x slower than AMA.
Best regards,
Tomasz Janeczko
amibroker.com
Does this help ?
Anthony
----- Original Message -----
From: das300@xxxxxxxxxx
To: amibroker@xxxxxxxxxxxxxxx
Sent: Tuesday, November 09, 2004 10:25 PM
Subject: [amibroker] Re: how to code this
I cant see how this would help byt thanks..
MOZ
--- In amibroker@xxxxxxxxxxxxxxx, "Anthony Faragasso" <ajf1111@xxxx>
wrote:
> I think AMA() or AMA2() could work. Check the Help manual.
>
> Anthony
> ----- Original Message -----
> From: das300@xxxx
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Tuesday, November 09, 2004 2:55 PM
> Subject: [amibroker] how to code this
>
>
>
> i want to code this in AB . In metastock i would have used the
PREV
> command but i dont thinkthere is one.
>
> VALUE[bar no1 ] = KONSTANT + ([VALUE'i-1] * Konstant2)
> where i = no of bars that have happened , i.e bars = days .
> then i wish to plot the VALUE at each i equalling a bar on chart .
>
> lets say
> Konstant = 2
> Konstant2 = 3
>
> value[day 1] = 2+ 0*3 = 2
> value[day 2] = 2+ 2*3 = 8
> value[day 3] = 2+ 8*3 = 26
> value[day 4] = 2+ 26*3 = 74
>
> I know it will use arrays and for loop ..but i have little
knowledge
> about making it happen ;-)
> thanks
> MOZ
>
>
>
>
>
> Check AmiBroker web page at:
> http://www.amibroker.com/
>
> Check group FAQ at:
http://groups.yahoo.com/group/amibroker/files/groupfaq.html
>
>
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