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Tomasz,
please, you have to believe I never sent any
request before searching. I've found the Metastock CBL formula, yesterday, just
by Google, at
<A
href="">http://www.guppytraders.com/Metastock%20Formulas/metastock%20formula%206.htm#Countback%20line%20for%20Metastock
They actually say that the formula is a solution
for Metastock. Perhaps, the original could be found in the Guppy's book <FONT
face="Times New Roman" size=3>"Share Trading: An Approach to Buying and
Selling". They say, also, the Metastock solution maybe isn't the best solution,
but it's a working solution.
Then I've found the same formula, maybe well
readable, at
<A
href="">http://eis.pl/kr/AFM/e-w-Countback_line.html
I think this URL is in your country.
Finally, I found a Countback line method (not
formula), described exactly in the same way as Stephan in his dll's help file.
This method seems quite different from the Metastock one.
Try, please, to look at the second URL. The formula
is clear enough and there is also a chart.
Best regards and thanks in advance.
Franco
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Tomasz Janeczko
To: <A title=amibroker@xxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Saturday, September 28, 20028:32
PM
Subject: Re: [amibroker] Re: countback
line
Franco,
As it was mentioned on this list there is some doubt if MS
formula really represents the original,
so I encourage you to go to <A
href="">www.google.com and do some
searching.
Please do a web search it is really useful. I remember
someone asking me for linear regression
not too long ago. I typed "linear regression" in the Google
and in 3 top results I found
very reasonable references.
It is easy, quick and does not hurt.
When you find some nice description - I will write the
formula.
Best regards,Tomasz Janeczkoamibroker.com
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Franco Fornari
To: <A title=amibroker@xxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Saturday, September 28, 2002 8:22
PM
Subject: Re: [amibroker] Re: countback
line
Tomasz,
thanks for your kind reply. I'll try to
re-write the formula in a more readable form and I'll send to you. If you
will have a spare moment, I will be happy, but if you have to spend toomuch
time, never mind, it's not a matter of life and death.
Thanks in advance and best
regards,
Franco
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Tomasz
Janeczko
To: <A
title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Saturday, September 28, 2002
8:00 PM
Subject: Re: [amibroker] Re:
countback line
Franco,
MS has its PREV because in MS you can not write loops
that iterate through quotes.
In AmiBroker you can - in VBScript or JScript or
DLL.
As for MS formula you quoted it is VERY, VERY unreadable
and if you want me to write
VBScript I need some description of what it should in
fact do.
I don't have time to reverse-engineer MS wrestling with
PREV.
Best regards,Tomasz
Janeczkoamibroker.com
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Franco Fornari
To: <A
title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Saturday, September 28, 2002
7:31 PM
Subject: Re: [amibroker] Re:
countback line
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 them to refer to themselves.
About AMA, in fact its internal logic
makes 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@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxx
Sent: Saturday, September 28,
2002 6:58 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 and so do not have it committed to memory. You
could search in the amibroker yahoo group for PREV or AMA or waitand
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 afunction
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@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxx
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 know it, 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@xxxx > 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 ifI
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)> H OR 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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