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Hi,
As I wrote in a separate e-mail you need an AMA
function to write your formula in AFL.
PREV function in your example is used to implement
variable-period exponential moving
average - it is exactly what AFL's AMA
does.
The difference between PREV and Ref( something, -1
) is important because
PREV gives previously generated value of the
indicator enabling recurrent formulas like
value[ n ] = somefunction( value[ n - 1]
)
Best regards,Tomasz Janeczko===============AmiBroker - the
comprehensive share manager.<A
href="">http://www.amibroker.com
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Bernard
Bourée
To: <A title=amibroker@xxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Sunday, June 10, 2001 5:05
PM
Subject: Re: [amibroker] MS PREV
Steve
I must admit that I am not sure that I have
fully understand the difference between the MS PREV function and the Ref(xx,
-1).
In your translation of my code you have replaced
PREV by Ref() function.
Are you sure that is correct ?
Bernard Bourée<A
href="">bbouree@xxxx
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Steve Wiser
To: <A title=amibroker@xxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Sunday, June 10, 2001 12:59
PM
Subject: Re: [amibroker] MS PREV
Bernard:Will this work for you. Remember as you
cut and paste, put this into notepad first to get the line breaks right.
Then cut and paste that into Amibroker. This appears to indicate when
a change in price direction may be eminent.Steveaa = C -
Ref(C,4);bb = Sum(Abs( C - ref(C,-1) ) ,4
);
/*Sum(Abs(ROC(C,1,$)),4);*/cc = (Abs((AA)/BB));dd =
((2/3)-(2/31))+(2/31);ee = ( CC*DD)^2 ;ff =
(C-Ref(C,-1));/*{Sig:= If( Cum(1) = 5,
Ref(C,-1)+EE*FF, PREV + EE * (C - PREV));}*/var1 = ee*ff+
Ref(C,-1);var2 = Ref(var1,-1)+EE*(C - Ref(var1,-1)
);var3 = IIf( Cum(1) == 5 , var1, var2);Graph1 =
var3;At 08:44 AM 6/10/01 +0200, you wrote:
Hi Tomasz
and Steve, Thank you for your
reply.Here is my
formula: aa= C -
Ref(C,4);<FONT face=arial
size=2>bb=Sum(Abs(Roc(C,1,$)),4)<FONT face=arial
size=2>cc=(Abs((AA)/BB))<FONT face=arial
size=2>dd=((2/3)-(2/31))+(2/31)<FONT face=arial
size=2>ee=(CC*DD)^2<FONT face=arial
size=2>ff=(C-Ref(C,-1))<FONT face=arial
size=2>Sig:=If(Cum(1)=5, Ref(C,-1)+EE*FF, PREV + EE * (C -
PREV)) <FONT face=arial
size=2>Regards Bernard
BouréeYour use of Yahoo! Groups is subject to
the Yahoo! Terms of
Service. Your
use of Yahoo! Groups is subject to the <A
href="">Yahoo! Terms of Service.
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