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Easy way for neuronaly challanged people like me
to remember...
Z
=(A*B)+(C*PREV);
can be written in AFL
as:Z = AMA2( A(rray), B, C );
-CS
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Jayson
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Tuesday, December 09, 2003 12:03
PM
Subject: RE: [amibroker] Re: Laguerre RSI
Indicator
<FONT face=Arial color=#0000ff
size=2>Thanks Dale,
<FONT face=Arial color=#0000ff
size=2>
Ara
pointed out privately that my first solution was incorrect. Following Tomasz's
example in 11896 ...
<FONT face=Arial color=#0000ff
size=2>
MS example
(close*0.18)+(PREV*0.82)can be written in AFL as:result = AMA2(
close, 0.18, 0.82 );orresult = AMA( close, 0.18
);
<FONT
face="Courier New">
<FONT face=Arial color=#0000ff
size=2>could we perhaps use AMA2 (which I always struggle with) to arrive at
something like?........
<FONT face=Arial color=#0000ff
size=2>
<FONT
face=Arial color=#0000ff>
g=<FONT face=Arial
color=#0000ff size=2>0.5<FONT face=Arial
color=#0000ff>;
L0=<FONT
color=#0000ff>AMA2(<FONT
size=2>1-g*<FONT
size=2>C<FONT
size=2>,1<FONT color=#282828
size=2>,g);
L1=-<FONT
color=#0000ff>AMA2(g*L0 +<FONT
size=2>Ref( L0,-1<FONT
size=2>),1<FONT color=#282828
size=2>,g);
L2=-<FONT
color=#0000ff>AMA2(g*L1 +<FONT
size=2>Ref( L1,-1)
,1<FONT
face=Arial color=#0000ff>, g);
L3=-<FONT
color=#0000ff>AMA2(g*L2 +<FONT
size=2>Ref( L2,-1<FONT
size=2>),1<FONT color=#282828
size=2>,g);
<FONT face=Arial
color=#0000ff>
cu= <FONT
color=#0000ff>IIf(L0>L1,
L0-L1,0) +<FONT
size=2>IIf(L1>L2, L1-L2,<FONT
size=2>0) + IIf<FONT
size=2>(L2>L3, L2-L3,0<FONT
color=#282828 size=2>);
cd= <FONT
color=#0000ff>IIf(L0<L1,
L1-L0,0) + <FONT
size=2>IIf(L1<L2, L2-L1,<FONT
size=2>0) + IIf<FONT
size=2>(L2<L3, L3-L2,0<FONT
color=#282828 size=2>);
temp= <FONT
color=#0000ff>IIf(cu+cd==<FONT
size=2>0, -1<FONT
color=#282828 size=2>,cu+cd);
x=<FONT
color=#0000ff>IIf(temp==-<FONT
size=2>1,0<FONT
color=#282828 size=2><FONT face=Arial
color=#0000ff>,cu/temp);<FONT
color=#0000ff>
<FONT face=Arial
color=#0000ff size=2><FONT
face=Arial color=#0000ff><FONT
color=#282828>
<FONT
color=#0000ff>Plot(x,"",4);
<FONT face=Arial color=#0000ff
size=2>graphxspace=10;
<FONT face=Arial color=#0000ff
size=2>
Regards,
Jayson
<FONT face=Tahoma
size=2>-----Original Message-----From: msc626
[mailto:msc626@xxxxxxxxx]Sent: Tuesday, December 09, 2003 1:08
PMTo: amibroker@xxxxxxxxxxxxxxxSubject: [amibroker] Re:
Laguerre RSI IndicatorAlso, check out messages
#11896, 12560 & 28399.dale b--- In amibroker@xxxxxxxxxxxxxxx,
"rck1135" <rkrebs@xxxx> wrote:> Thanks to Ara, Graham and Jayson
for your responses to my post re the > Laguerre RSI
indicator. Obviously, the MS code is vastly different > than the
AFL language, but the result is plotted by the 'IF' > statement in the
last line; If temp is equal to -1 then display a '0' > otherwise
display the value of 'cu divided by temp'. The trick in > this
formula is to duplicate the MS 'Prev' function and I appreciate >
the references to past posts on this subject. The 'Prev' constant
> allows one to create self-referencing formulas - one that is able
to > reference the previous period's value of itself.
Example:> ((H+L+C)/3)+PREV> the formula divides the High, Low
and Close price by 3 and then adds > this value to Yesterday's
value of the ((H+L+C)/3). > One wouls assume that the PREV
function could be readily replace by > the AB Ref() function, but it is
not that easy. At any rate I will > continue to attemp[t a
conversion of this indicator as it is pretty > good.> >
Thanks again,> Ron> > > > g:=0.5;>
L0:=((1-g)*C) + (g*PREV);> L1:=(-g*L0) + Ref(L0,-1) + (g*PREV);>
L2:=(-g*L1) + Ref(L1,-1) + (g*PREV);> L3:=(-g*L2) + Ref(L2,-1) +
(g*PREV);> > cu:= If(L0>L1, L0-L1,0) + If(L1>L2, L1-L2,0)
+ If(L2>L3, L2-L3,0);> cd:= If(L0<L1, L1-L0,0) + If(L1<L2,
L2-L1,0) + If(L2<L3, L3-L2,0);> > temp:= If(cu+cd=0,
-1,cu+cd);> If(temp=-1,0,cu/temp)Send BUG
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