[amibroker] Puzzled about ParamOptimize()

[Thomas Ludwig <Thomas.Ludwig@xxxxxx>]

I'm using the ParamOptimize function in the following form:

function popt( Titlename, default, minv, maxv, step )
{
return Optimize( Titlename, 
Param( Titlename, default, minv, maxv, step ),
minv, maxv, step );
}

I included it, e.g., in the T3 formula:

#include <Paramoptimize.afl>

function T3(price,periods)
{
s = popt("s",0.8,0.2,2,0.1);
e1=EMA(price,periods);
e2=EMA(e1,Periods);
e3=EMA(e2,Periods);
e4=EMA(e3,Periods);
e5=EMA(e4,Periods);
e6=EMA(e5,Periods);
c1=-s*s*s;
c2=3*s*s+3*s*s*s;
c3=-6*s*s-3*s-3*s*s*s;
c4=1+3*s+s*s*s+3*s*s;
Ti3=c1*e6+c2*e5+c3*e4+c4*e3;
return ti3;
}

P = ParamField("Price field",-1);
Periods = popt("Periods", 15, 2, 200, 1 );
Plot(t3(p,periods),_DEFAULT_NAME(), ParamColor( "Color", colorCycle ), 
ParamStyle("Style") ); 

... and it plots perfectly okay.

However, if I include it in the Hull MA formula like this:
#include <ParamOptimize.afl>

P = ParamField("Price field",-1);

HullMA = HullMaFunction( P, Periods, Delay ); 
Periods = popt("Periods", 15, 2, 200, 1 );
Delay = popt("Delay", 0, 0, 10, 1 );
X = 2 * WMA(P,round(Periods/2)) - WMA(P,Periods);
HullMA = WMA(X,round(sqrt(Periods)));
HullMA = Ref(HullMA,-Delay);Plot( HullMA, _DEFAULT_NAME(), 
ParamColor( "Color", colorCycle ),ParamStyle("Style") ); 

space = Param("Graph Space", 10, 0, 25, 1);
GraphXSpace = space;

... and I try to plot this indicator I get the following error:

Price:
return Optimize(Titlename,
Param(Titlename, default, minv, maxv, step),
minv, maxv, step);
}
^

Error 32.
Syntax error, probably missing semicolon at the end of the previous line


I'm probably blind but I'm not able to see why the same function works in one 
formula but doesn't work in the other. By the way: If I click the "Verify 
syntax" button in the editor for the Hull MA fomula I don't get any error 
message.

Any idea what's going on here?

Regards,
Thomas


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