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Bruce,
The code I have given (and also Jayson's code) works correcly
*IF* you draw the study lines
on DEFAULT PRICE chart and label them
correctly.
This is so because Study by default refers to built-in price
chart id which is zero
<A
href="">http://www.amibroker.com/guide/afl/afl_view.php?name=STUDY
You are apparently using the formula NOT on the default price
chart. But you did not mention it.
In that case you have to refer to given pane Chart ID which is
displayed in the Indicator Builder.
As an alernative you can use GetChartID function to retrieve
current chart ID automatically
<A
href="">http://www.amibroker.com/guide/afl/afl_view.php?name=GETCHARTID
The version that works on any chart (not only built-in price
chart) would look like this:
x=ValueWhen(NOT
IsNull( <FONT
color=#0000ff size=1>Study(<FONT color=#ff00ff
size=1>"re",<FONT color=#0000ff
size=1>GetChartID())),<FONT color=#0000ff
size=1>Study(<FONT color=#ff00ff
size=1>"re",<FONT
face="Courier New" color=#0000ff size=1>GetChartID<FONT
face="Courier New" size=1>()));
y=ValueWhen(NOT
IsNull( <FONT
color=#0000ff size=1>Study(<FONT color=#ff00ff
size=1>"su",<FONT color=#0000ff
size=1>GetChartID())),<FONT color=#0000ff
size=1>Study(<FONT color=#ff00ff
size=1>"su",<FONT color=#0000ff
size=1>GetChartID()));<FONT face="Courier New"
size=1>
Title = WriteVal<FONT
size=1>(x) + <FONT
face="Courier New" color=#ff00ff size=1>":"<FONT face="Courier New"
size=1> + WriteVal<FONT
size=1>(y) + <FONT
face="Courier New" color=#ff00ff size=1>":"<FONT face="Courier New"
size=1> + WriteVal<FONT
size=1>(x-y);
Best regards,Tomasz Janeczkoamibroker.com
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Bruce
Nutter
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Wednesday, October 15, 2003 3:07
AM
Subject: RE: [amibroker] How do I
subtract the difference between two horizontal study lines? (in AFL)
<SPAN
>Gurus, Jason & <SPAN
class=SpellE>Tomasz,
<SPAN
>My result of <SPAN
class=SpellE>Tomasz‘s example code (shown below) with horizontal study
lines labeled “re” and “su” is as
follows:
<SPAN
>
<FONT face="Times New Roman" color=black
size=3><SPAN
>{EMPTY}<FONT
color=black>
<FONT face="Times New Roman" color=black
size=3><SPAN
>{EMPTY}<FONT
color=black>
<FONT face="Times New Roman" color=black
size=3><SPAN
>{EMPTY}<FONT
color=black>
<SPAN
>
<SPAN
>Please
advise,
<SPAN
>Bruce
<SPAN
>-----Original
Message-----From: Tomasz
Janeczko [mailto:amibroker@xxxxxx] <SPAN
>Sent<SPAN
>: <st1:date Year="2003"
Day="14" Month="10"><SPAN
>Tuesday, October 14,
2003<SPAN
> <st1:time
Minute="27" Hour="14"><SPAN
>2:27
PM<SPAN
><SPAN
>To: <A
href="">amibroker@xxxxxxxxxxxxxxx<SPAN
>Subject: Re: [amibroker] <SPAN
class=GramE>How do I subtract the difference between two horizontal
study lines? (in AFL)
<FONT face="Times New Roman"
size=3>
<FONT face="Times New Roman"
size=2>Bruce,
<FONT face="Times New Roman"
size=3>
<FONT face="Times New Roman"
size=2>Please use this
code:
<FONT face="Times New Roman"
size=3>
<P class=MsoNormal
><FONT
face="Courier New" color=black size=1><SPAN
>x=<FONT
face="Courier New" color=blue size=1><SPAN
>ValueWhen<FONT
face="Courier New" color=black size=1><SPAN
>(NOT IsNull(
<SPAN
>Study<FONT
face="Courier New" color=black size=1><SPAN
>(<FONT
face="Courier New" color=fuchsia size=1><SPAN
>"re"<FONT
face="Courier New" color=black size=1><SPAN
>)),<FONT
face="Courier New" color=blue size=1><SPAN
>Study<FONT
face="Courier New" color=black size=1><SPAN
>(<FONT
face="Courier New" color=fuchsia size=1><SPAN
>"re"<FONT
face="Courier New" color=black size=1><SPAN
>));
<P class=MsoNormal
><FONT
face="Courier New" color=black size=1><SPAN
>y=<FONT
face="Courier New" color=blue size=1><SPAN
>ValueWhen<FONT
face="Courier New" color=black size=1><SPAN
>(NOT IsNull(
<SPAN
>Study<FONT
face="Courier New" color=black size=1><SPAN
>(<FONT
face="Courier New" color=fuchsia size=1><SPAN
>"su"<FONT
face="Courier New" color=black size=1><SPAN
>)),<FONT
face="Courier New" color=blue size=1><SPAN
>Study<FONT
face="Courier New" color=black size=1><SPAN
>(<FONT
face="Courier New" color=fuchsia size=1><SPAN
>"su"<FONT
face="Courier New" color=black size=1><SPAN
>));
<P class=MsoNormal
><FONT
face="Courier New" color=blue size=1><SPAN
>WriteVal<FONT
face="Courier New" color=black size=1><SPAN
>(x);
<P class=MsoNormal
><FONT
face="Courier New" color=blue size=1><SPAN
>WriteVal<FONT
face="Courier New" color=black size=1><SPAN
>(y);
<P class=MsoNormal
><FONT
face="Courier New" color=blue size=1><SPAN
>WriteVal<FONT
face="Courier New" color=black size=1><SPAN
>(x-y);
<P class=MsoNormal
><FONT
face="Times New Roman" size=3><SPAN
> <FONT face="Courier New"
color=black size=1><SPAN
>
<FONT face="Times New Roman"
size=3>Hope this
helps.
<FONT face="Times New Roman"
size=3>
<FONT face="Times New Roman"
size=3>Best regards,Tomasz
Janeczkoamibroker.com
<BLOCKQUOTE
>
<SPAN
>----- Original Message -----
<FONT
face=Arial size=2><SPAN
>From:<FONT
face=Arial size=2> <A
title=bdnutter@xxxxxxxxxxx href="">Bruce
Nutter
<FONT face=Arial
size=2><SPAN
>To:<FONT
face=Arial size=2> <A
title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
<FONT face=Arial
size=2><SPAN
>Sent:<FONT
face=Arial size=2>
<FONT face=Arial
size=2>Tuesday, October
14, 2003<SPAN
> <st1:time
Minute="9" Hour="22"><SPAN
>10:09
PM<SPAN
>
<FONT face=Arial
size=2><SPAN
>Subject:<FONT
face=Arial size=2> RE:
[amibroker] How do I subtract the difference between two horizontal study
lines? (in AFL)
<FONT face="Times New Roman"
size=3><SPAN
>
<P class=MsoNormal
><FONT
face="Courier New" color=black size=1><SPAN
>Gurus and
Jayson
<P class=MsoNormal
><FONT
face="Courier New" color=black size=1><SPAN
>I tried
this code so I could see the difference between the two horizontal lines.
But the results I get in the interpretation window is shown below. Could
some guru please tell me why this does not work. (For those of you who might
ask yes the labels of my horizontal study lines are “re” and
“su”)
<P class=MsoNormal
><B
><FONT face="Courier New" color=black
size=5><SPAN
>Formula
code:
<P class=MsoNormal
><FONT
face="Courier New" color=black size=1><SPAN
>x=<FONT
face="Courier New" color=blue size=1><SPAN
>LastValue<FONT
face="Courier New" color=black size=1><SPAN
>(<FONT
face="Courier New" color=blue size=1><SPAN
>Study<FONT
face="Courier New" color=black size=1><SPAN
>(<FONT
face="Courier New" color=fuchsia size=1><SPAN
>"re"<FONT
face="Courier New" color=black size=1><SPAN
>));
<P class=MsoNormal
><FONT
face="Courier New" color=black size=1><SPAN
>y=<FONT
face="Courier New" color=blue size=1><SPAN
>LastValue<FONT
face="Courier New" color=black size=1><SPAN
>(<FONT
face="Courier New" color=blue size=1><SPAN
>Study<FONT
face="Courier New" color=black size=1><SPAN
>(<FONT
face="Courier New" color=fuchsia size=1><SPAN
>"su"<FONT
face="Courier New" color=black size=1><SPAN
>));
<P class=MsoNormal
><FONT
face="Courier New" color=blue size=1><SPAN
>WriteVal<FONT
face="Courier New" color=black size=1><SPAN
>(x);
<P class=MsoNormal
><FONT
face="Courier New" color=blue size=1><SPAN
>WriteVal<FONT
face="Courier New" color=black size=1><SPAN
>(y);
<P class=MsoNormal
><FONT
face="Courier New" color=blue size=1><SPAN
>WriteVal<FONT
face="Courier New" color=black size=1><SPAN
>(x-y);
<P class=MsoNormal
><B
><FONT face="Courier New" color=black
size=5><SPAN
>Interpretation
window result:
<P class=MsoNormal
><FONT
face="Courier New" color=black size=1><SPAN
>0
<P class=MsoNormal
><FONT
face="Courier New" color=black size=1><SPAN
>0
<P class=MsoNormal
><FONT
face="Courier New" color=black size=1><SPAN
>0
<P class=MsoNormal
><FONT
face="Courier New" color=black size=1><SPAN
>
<P class=MsoNormal
><FONT
face="Courier New" color=black size=1><SPAN
>
<FONT face="Times New Roman"
color=black size=3><SPAN
>Bruce
<FONT face="Times New Roman"
color=black size=3><SPAN
>
<SPAN
>-----Original
Message-----From: Jayson
[mailto:jcasavant@xxxxxxxxxxx] <SPAN
>Sent: <st1:date
Year="2003" Day="14" Month="10"><SPAN
>Tuesday, October 14,
2003<SPAN
> <st1:time
Minute="49" Hour="9"><SPAN
>9:49
AM<SPAN
><SPAN
>To:
amibroker@xxxxxxxxxxxxxxx<SPAN
>Subject: RE: [amibroker] How do I
subtract the difference between two horizontal study lines? (in
AFL)
<FONT face="Times New Roman"
size=3>
<FONT face=Arial color=blue
size=2><SPAN
>Brian,
<FONT face=Arial color=blue
size=2>have a
look in the help files for Study(). You can name your trend line than call
its value in a code.
<FONT face="Times New Roman"
size=3><SPAN
>
<FONT face=Arial color=blue
size=2>for
instance in this exploration I have named 2 study lines and called the last
value of each and subtracted one from the
other....
<FONT face="Times New Roman"
size=3><SPAN
>
<FONT face="Times New Roman"
size=2><SPAN
>
<FONT face=Arial color=blue
size=2><SPAN
>Filter=C>0;<FONT
color=#282828 size=2><SPAN
>
<FONT face=Arial color=blue
size=2><SPAN
>x=<FONT
color=blue size=2><SPAN
>LastValue(Study("s1"))<FONT
face=Arial color=blue size=2><SPAN
>;<FONT
face=Arial color=#282828 size=2><SPAN
>
<FONT face=Arial color=blue
size=2><SPAN
>y=<FONT
color=blue size=2><SPAN
>LastValue(Study("s<FONT
face=Arial color=blue size=2><SPAN
>2<FONT
color=blue size=2><SPAN
>")<FONT face=Arial
color=blue size=2><SPAN
>);<FONT
face=Arial color=#282828 size=2><SPAN
>
<FONT face=Arial color=blue
size=2><SPAN
>AddColumn<FONT
face=Arial color=#282828 size=2><SPAN
>(x,<FONT
face=Arial color=fuchsia size=2><SPAN
>""<FONT
face=Arial color=#282828 size=2><SPAN
>);<FONT
color=#282828 size=2><SPAN
>
<FONT face=Arial color=blue
size=2><SPAN
>AddColumn<FONT
face=Arial color=#282828 size=2><SPAN
>(y,<FONT
face=Arial color=fuchsia size=2><SPAN
>""<FONT
face=Arial color=#282828 size=2><SPAN
>);
<FONT face=Arial color=blue
size=2><SPAN
>AddColumn<FONT
face=Arial color=#282828 size=2><SPAN
>(x-y,<FONT
face=Arial color=fuchsia size=2><SPAN
>""<FONT
face=Arial color=#282828 size=2><SPAN
>);
<FONT face="Times New Roman"
size=3><SPAN
>
<FONT face="Times New Roman"
size=3><SPAN
>
<FONT face=Arial color=blue
size=2><SPAN
>Regards,
<FONT face=Arial color=blue
size=2><SPAN
>Jayson
<P class=MsoNormal
><FONT
face=Tahoma size=2><SPAN
>-----Original
Message-----From: Bruce
Nutter [mailto:bdnutter@xxxxxxxxxxx]<SPAN
>Sent: <st1:date
Year="2003" Day="14" Month="10"><SPAN
>Tuesday, October 14,
2003<SPAN
> <st1:time
Minute="26" Hour="12"><SPAN
>12:26
PM<SPAN
><SPAN
>To:
amibroker@xxxxxxxxxxxxxxx<SPAN
>Subject: [amibroker] How do I subtract
the difference between two horizontal study lines? (in
AFL)
<FONT face="Times New Roman"
color=black size=3><SPAN
>Gurus,
<FONT face="Times New Roman"
color=black size=3>Does anybody
know how to subtract between two horizontal study lines in AFL code? I have
to study lines that I move around to calculate entry and exit points. What
I'd like to do is to show that vertical distance between these two
horizontal lines in the interpretation window. Would one of you gurus please
let me know how to do this?
<FONT face="Times New Roman"
color=black size=3><SPAN
>Bruce
<FONT face="Times New Roman"
size=3><FONT
face="Courier New" size=2>Send BUG REPORTS to
bugs@xxxxxxxxxxxxx<SPAN
><FONT
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