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Ken,
as I wrote in my first message, I don't have
forgotten what Tomasz said about PREV and AMA. They are not identical. AMA is an
adaptive moving average, PREV works with other functions allowing themto
refer to themselves.
About AMA, in fact its internal logicmakes
inessential any function like PREV, but remains an adaptive moving average,
that's all. Metastock's CBL don't uses any average, it only refers to hard
values, and PREV have to do the same.
Best regards,
Franco
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Ken Close
To: <A title=amibroker@xxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Saturday, September 28, 20026:58
PM
Subject: RE: [amibroker] Re: countback
line
<SPAN
class=480055716-28092002>Franco:
<SPAN
class=480055716-28092002>
Tomasz will
jump in here sometime and say that the AMA or ___? other function in Amibroker
does exactly what PREV does in MS and does it faster. I do not use it andso
do not have it committed to memory. You could search in the amibroker
yahoo group for PREV or AMA or wait and perhaps Tomasz or someone else will
post a past message on this topic.
<SPAN
class=480055716-28092002>
<SPAN
class=480055716-28092002>Ken
<FONT face=Tahoma
size=2>-----Original Message-----From: Franco Fornari
[mailto:ffpsi@xxxx]Sent: Saturday, September 28, 2002 12:09
PMTo: amibroker@xxxxxxxxxxxxxxxSubject: Re: [amibroker]
Re: countback line
Hello,
yes, I know there isn't in AFL a function
equivalent to PREV. I tried to use a VB Script, but I'm not able enough.
Do you know if there is, somewhere on the WEB, the original Guppy's
formula?
Best regards,
Franco
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
<A title=nenapacwanfr@xxxx
href="">Stephane Carrasset
To: <A title=amibroker@xxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Saturday, September 28, 2002 4:51
PM
Subject: [amibroker] Re: countback
line
hello,there is not prev function in
Amibrokerprev is a recursive function, BUT you can defind it
with a scripting languagemy choise was since one year was C++but
there is jscript and vbscriptabout the cbl, I think the ms version
is not matching the guppy principles but only an adaptation .this is
not the best trailing stop...steph> > thanks for your
reply. Maybe you are referring to the dll shared by Stephan. I knowit,
but its logic seems rather different and I'd like to match it against
Metastock's CBL.> > Thanks again and best regards>
> Franco> ----- Original Message -----
> From: grant > To: amibroker@xxxxx
> Sent: Saturday, September 28, 2002 4:14
PM> Subject: Re: [amibroker] countback line>
> > Franco,
> CBL has been converted
somewhere here before but I can't find it at the moment,
> maybe if you check AB website formular page. I have a
feeling it was also in one > of Steven's DLL's. Sorry
I'm not much help to you but at least you know it's here
> somewhere, I'll keep looking.
>
Grant > Franco Fornari wrote: >
> Hello Tomasz and All, sorry if I propose
the same question again, but I'd need to know if it's possible to
convert from Metastock language to AFL any formula containing PREV
function. Tomasz showed many times, in past, how work AMA and AMA2 but,
if I'm not wrong, this case seems different, because in "Countback line"
Metastock formula, PREV doesn't refer to any averages but to hard
values. Is it possible to translate the following formula to AFL?
LowDays := Input("Enter # days to cover last LOW for CBL calc'n:",
3, 55, 13); > If(LOW > LLV(LOW,
LowDays), {then ...} PREV, {previous CBLlo, else...} If(Ref(H,-2) >
Ref(H,-1) AND Ref(H,-2) > H AND Ref(H,-1) > H, {then ...}
Ref(H,-2), {2nd day back high,else...} If((Ref(H,-3)> Ref(H,-2) AND
Ref(H,-3) > Ref(H,-1) AND Ref(H,-3) > H) AND (Ref(H,-2)> HOR
Ref(H,-1) > H), {then ... } Ref(H,-3), {3rd day back high,else...}
If((Ref(H,-4)> Ref(H,-3) AND Ref(H,-4) > Ref(H,-2) AND Ref(H,-4)
> Ref(H,-1) AND Ref(H,-4) > H) AND (Ref(H,-3)> H OR Ref(H,-2)
> H OR Ref(H,-1) > H), {then... } Ref(H,-4), {4th day back
high,else...} If((Ref(H,-5)> Ref(H,-4) AND Ref(H,-5) > Ref(H,-3)
AND Ref(H,-5) > Ref(H,-2) AND Ref(H,-5) > Ref(H,-1) AND Ref(H,-5)
> H) AND (Ref(H,-4)> H OR Ref(H,-3) > H OR Ref(H,-2) > H OR
Ref(H,-1) > H), {then ...} Ref(H,-5), {5th day back high,else...}
PREV ))))) Any suggestion will be wellcome. Best regards,
Franco > > >
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