No doubt “jooleanlogic” approach works.
However, this approach has several drawbacks: 1. Each time one has to copy and
paste the data loading afl you described below, which makes each afl longer and
less overviewable and 2. One now has a datafile inside the AMIBroker root
directory (Although presumably it could be redirected to a data directory; in
both cases it requires occasional data look up and review/edit). An
easier way, if one wants to use this approach, is to place the dataload afl in
the "include" directory (Repl Study “jooleanlogic”.afl)
which therefore is now at least universally accessible by each afl that
requires it. Then load this afl after the Plot statement.
(Don’t ask me why: One would think that it should be before the Plot
statement; possibly something to do with layers).
This will result in:
//Repl Study “jooleanlogic” Complete.afl
Title = EncodeColor(4)+ _DEFAULT_NAME()+";
"+EncodeColor(1) + StrFormat("{{NAME}} - {{INTERVAL}}; {{DATE}};
O=%g, H=%g, L=%g, C=%g (%.1f%%)
{{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 )
) );
Plot(C, "Close",1,64); //has to be before
Include statement
#include < Repl Study
“jooleanlogic”.afl>
//Plot(C, "Close",1,64);//Will not plot C if after
include statement!!!!
====================================================
I normally use an even simpler approach. (Unless
the data are already in a file in a prescribed format and in addition there are
many data points, and one therefore is somewhat boxed in). I generate a simple
data afl that already includes Plot statements in the include directory
(“Repl Study Simplified.afl”) and access this afl thru an include statement
in the actual Plot Afl (“Repl Study Simpl Complete.afl”). This way I
only have to copy 1 Line (#include <Repl Study Simplified.afl>).
//Repl Study Simpl Complete.afl
Title = EncodeColor(4)+ _DEFAULT_NAME()+";
"+EncodeColor(1) + StrFormat("{{NAME}} - {{INTERVAL}}; {{DATE}};
O=%g, H=%g, L=%g, C=%g (%.1f%%)
{{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 )
) );
Plot(C, "Close",1,64); //has to be before
Include statement
#include <Repl Study Simplified.afl>
//Repl Study Simplified.AFL in Include Directory
Title = EncodeColor(4)+ _DEFAULT_NAME()+";
"+EncodeColor(1) + StrFormat("{{NAME}} - {{INTERVAL}}; {{DATE}};
O=%g, H=%g, L=%g, C=%g (%.1f%%)
{{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 )
) );
// 1. For lines that can be defined by an algebraic
equation/functional relationship.
ShowLines=ParamToggle("ShowLines","No|Yes",0);
imax=10;
LowerLimit= 83;
UpperLimit= 84;
if (ShowLines)
{
for( i = 1; i <imax; i++ )
{
x=LowerLimit+(UpperLimit-LowerLimit)/(imax) *i;
Plot( x, "\nLine"+WriteVal(i,2.0), 1);
}
}
/*
// 2. For values that can not be described by an
algebraic relationship/functional relationship.
ShowLines=ParamToggle("ShowLines","No|Yes",0);
function Line( k )
{
return VarGet( "Line"+
StrFormat("%01.0f", k ) );
}
Line1=83.0123;
Line2=83.1435;
Line3=83.27454;
Line4=83.312;
Line5=83.487;
Line6=83.5435;
Line7=83.632;
Line8=83.787;
Line9=83.890;
Line10=83.967;
Line11=84.043;
if (ShowLines)
{
for( i = 1; i <=11; i++ )
{
Plot( Line( i ), "\nLine"+WriteVal(i,2.0), 1);
}
}
From:
amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of jooleanlogic
Sent: Sunday, October 18, 2009 10:02 AM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Re: Replicating Studies
The issue of copying actual studies has been covered a few times from memory
Sid but I don't know where it stands.
I created a script for it because I got so sick of not only copying study lines
but re-copying them whenever you change one.
The following is a simple display of what I was referring to in my last post.
Add this to any existing script that has a price plot.
Create a text file called levels.txt with a different level value on each line
and put it in the root Amibroker folder.
This code just loads that data into static vars when you click the Load button,
then displays them.
I use a similar one and find it the fastest way to display horizontal levels
across multiple charts. It has the natural advantage that you only have to
change a value once in the text file to have it updated across all charts.
showLevels = ParamToggle("Show Levels", "No|Yes");
filename = ParamStr("Filename", "levels.txt");
LoadTrigger = ParamTrigger("Load Levels", "Load Levels");
VarPrefix = "levels";
procedure loadLevels (){
fh = fopen(filename, "r");
if(fh) {
StaticVarRemove(VarPrefix + "*");
LevelCount = 0;
while(!feof(fh)){
Line = fgets(fh);
LevelCount++;
LevelValue = StrToNum(Line);
StaticVarSet(VarPrefix + LevelCount, LevelValue);
}
StaticVarSet(VarPrefix + "levelcount", LevelCount);
fclose(fh);
}
}
procedure displayLevels(){
LevelCount = StaticVarGet(VarPrefix + "levelcount");
if (!IsEmpty(LevelCount)){
for (i=1; i<=LevelCount; i++){
LevelValue = StaticVarGet(VarPrefix + i);
if (!IsEmpty(LevelValue)){
Plot(LevelValue, "", colorBlack, styleLine);
}
}
}
}
if(LoadTrigger){
LoadLevels();
}
if (showLevels){
displayLevels();
}
The levels.txt file would look something like this
4000
4005
4020
4035
etc
Regards,
Jules.
--- In amibroker@xxxxxxxxxxxxxxx,
"Rob" <sidhartha70@xxx> wrote:
>
> Ummm... it's a tricky one. I'm not particularly keen to reinvent the wheel
and create my own study plotting interface...
>
> Before I go down that road I just want to check I'm not missing a more
obvious way of replicating studies across charts of different symbols... i.e.
highly correlated symbols where the price action is similar enough that they
broadly have similar characteristics... for example, reaction highs and lows in
roughly the same places... etc
>
>
> --- In amibroker@xxxxxxxxxxxxxxx,
"jooleanlogic" <jooleanl@> wrote:
> >
> > I just manually write levels in a text file Rob and then have a
simple script to load and plot them which you can add to any chart.
> >
> > You can also prefix different types of levels. E.g.
> > vah,4000
> > poc,3990
> > val,3985
> > vah,3970
> > ...
> > and plot them in different colours or turn different types off/on.
> >
> > Regards,
> > Jules.
> >
> > --- In amibroker@xxxxxxxxxxxxxxx,
"Rob" <sidhartha70@> wrote:
> > >
> > > Can anyone think of a good way of 'replicating' studies across
charts and symbols...
> > >
> > > For example, thinking of something very simple... lets pretend I
wanted to draw a horizontal line across a reaction low in the ES contract...
would there be an easy way of replicating that study in the NQ contract (i.e.
across that same reaction low but in a different contract).
> > >
> > > I need to do something similar across multiple contracts,
multiple times... so a way of automating the replication would be very useful.
> > >
> > > Suggestions appreciated...
> > >
> > > TIA
> > >
> >
>
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