[amibroker] Help on Jurik Approx

["Anthony Gutierrez" <ospreyag@xxxxxxxxxx>]

THe following was posted some time ago:

/*TREND DETECTOR WITH VARIABLE PERIOD, by D. Tsokakis, Apr2003*/
t=20;// the initial fast period
x=JurikJMA(StochD(40),t);
Plot(x,"",1,8);// fast trend detector
tA=50;// slow period
xA=JurikJMA(StochD(40),tA);
Plot(xA,"",7,8);// slow trend detector
Cond1=Ref(x,-1)==LLV(x,3);
Plot(50*Cond1,"",5,2);// the start of the fast uptrend
Cond2=Ref(x,-1)==HHV(x,3);
Plot(50*Cond2,"",4,2);// the end of the fast uptrend
k1=BarsSince(Cond1);// uptrend bar counter
k2=BarsSince(Cond2);// downtrend bar counter
Plot((k2>k1)*10,"",5,2);
Plot((k2<k1)*10,"",4,2);
t1=IIf(k2>k1,t+k1,t+k2);// the variable period
x1=DEMA(StochD(40),t1);// the variable trend detector
Plot(x1,"",(x1>Ref(x1,-1))*5+(x1<Ref(x1,-1))*4,8);
GraphXSpace=1; 

When I ran the above code, I get an error message at x=JurikJMA(
I do not think there is a "JurikJMA" function built into Amibroker 
and JurikJMA is not defined.  Do I need to download it somewhere or 
do I missed part of the code.  Any feedback is greatly appreciated.

Anthony



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