Tony,
Hi. I
just wanted to post the code with the changes that I made to Bill’s code.
Below is a full version that you should be able to
use.
The PlotVolumeBool is
just a parameter that I use to toggle it on and off quickly. I’ve found
that sections are useful for grouping code logically, but I like to group key
parameters (like “control” flags) together. So, while I may have
code and other parameters in sections, I place the parameters at the top and
order them as I please. I’ve added the PlotVolumeBool
parameter.
The other code is the
L1 and U1 functions. On my system, I’ve placed them in an include
file with my other functions. To make this run, I added them to the code
below. If you want to stuff the L1 and U1 functions into an
include file:
- Create the include
file.
- Save it to the
…\Amibroker\Formulas\Include\ folder with an appropriate name (e.g.
“ABFunctions.afl”).
- Cut (not copy) and paste the L1
and U1 function code to the include file.
- Unrem the ““#include…” line
below.
- Change the filename in the
“#include…” line to your filename.
Regarding include
files…
I recommend using an
include file under virtually all circumstances. It cleans up the code
and makes it much more manageable. There’s nothing worse that
having linear regression code that is slightly differently in three different
instances. That’s nightmare city.
When developing new
code, I create and test it in-line. Then, when it’s finished I move it
to an include file if it meets one of two
conditions:
- If the code is more than about
10 lines long, or
- If there is even a slight
possibility that the code will be reused in another scan or
chart.
The only exception
where I keep in-line code is when a scan, exploration or a back testing that
runs slowly because of the include file. I.e., I’ll put the
code in an include file and then move it back to in-line code if it’s
unacceptably long-running. So far, I haven’t found that
condition.
Regards,
Dan.
_SECTION_BEGIN("Color
Volume Overlay ");
//#include
<YourFunctionIncludeFileNameHere.afl>
PlotVolumeBool =
ParamToggle("Plot
Volume?",
"No|Yes", 1);
function L1
(Var, LowerFreespacePercent,
UpperFreespacePercent)
{
// Lower limit for plotting one variable
vis = Status("barvisible");
Hii = LastValue(Highest(Var*vis));
Loo = LastValue(Lowest((Var - Hii)*vis) + Hii);
range = Hii - Loo;
rangePercent = 100 - LowerFreespacePercent - UpperFreespacePercent;
mult = range / rangePercent;
result = Loo - mult*LowerFreespacePercent;
return result;
}
// Upper
limit for plotting one variable
function U1
(Var, LowerFreespacePercent,
UpperFreespacePercent)
{
vis = Status("barvisible");
//
vis = Status("barvisible");
Hii = LastValue(Highest(Var*vis));
Loo = LastValue(Lowest((Var - Hii)*vis) + Hii);
range = Hii - Loo;
rangePercent = 100 - LowerFreespacePercent - UpperFreespacePercent;
mult = range / rangePercent;
result = Hii + mult*UpperFreespacePercent;
return result;
}
if
(PlotVolumeBool)
{
V = round(V/1000);
Plot(V, "Vol", IIf( C > Ref(C, -1), ParamColor("Up Color", colorGreen ),
ParamColor("Down Color", colorRed ) ), styleHistogram | styleOwnScale +
styleNoLabel + styleNoTitle, L1(V, 5, 65), U1(V, 5, 65)
);
Plot( round(MA( V, 50 )), "Vol MA(50)", ParamColor( "Vol MA Color",
colorOrange), styleLine | styleOwnScale + styleNoLabel + styleNoTitle, L1(V,
5, 65), U1(V, 5, 65) );
}
_SECTION_END();
From:
amibroker@xxxxxxxxxxxxxxx
[mailto:amibroker@xxxxxxxxxxxxxxx]
On Behalf Of Tony
Lei
Sent: Sunday, October 09,
2005 6:40 AM
To:
amibroker@xxxxxxxxxxxxxxx
Subject: Re: [amibroker] How to plot
volume in price pane using 1/3 of pane?
Hi Dan,
I seem to get an error
from the volume code.
Any
help
thanks
tony
On 10/8/05, Dan Clark <dan_public@xxxxxxxxxxx>
wrote:
Ara,
Sorry for the
confusion. I wasn't referring to PlotVAPOverlay(). I was
referring to Plot(V).
Thanks
anyway,
Dan.
you can control it by parameters..
Once you display the volume on price, display the parameters and change the
"width"
----- Original Message -----
Sent: Friday,
October 07, 2005 11:47 PM
Subject:
[amibroker] How to plot volume in price pane using 1/3 of
pane?
Hi,
I'd like to overlay a
volume histogram in a price bar pane,
but set it up so that the tallest
volume bar take up onlys
Thanks and
regards,
Dan.
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