[amibroker] Linear Regression Line Array not plotting, please help

["wooziwog" <xcitemint@xxxxxxx>]

The following formula plots the Linear Regression.  I have created the start and ending points for the linearray as well as the starting and ending y values.  When I press the "apply indicator" the line array appears for a moment and then disappears.  Any help in identifying my coding error is appreciated.

Thanks,

David K.

//Linear Regression Line Array

GraphXSpace=5;
Plot(C,"",29,128|4);

pds=20;
lbk=0;
bi = BarIndex()+1;
sb = SelectedValue(BarIndex());
sx = SelectedValue(bi)-lbk;
aa = SelectedValue(Ref(LinRegIntercept(C,pds),-lbk));
bb = SelectedValue(Ref(LinRegSlope(C,pds),-lbk));
yy = aa + bb * (bi-(sx - pds+1));
xs = sb - pds - lbk;//Linearray starting point
ys = SelectedValue(Ref(yy, -pds-lbk));//Linearray starting value
xe = sb - lbk;//Linearray ending point
ye = ys + bb *(xe - xs);//Linearray starting value
LR = IIf(bi >= (sx - pds) AND bi <= sx, yy, Null);//standard LR line 
Plot(LR, "LR", 10, 1);//plot Linear Regression Line

Plot(IIf(bi>xs,ys,Null),"",36,8);//Linearray starting Value from "xs"
Plot(IIf(bi>xe,ye,Null),"",36,8);//Linearray ending Value from "xe"
Plot(LineArray(xs,ys,xe,ye,1),"LR",25,1);//This line only plots for a moment when "apply indicator" is pressed and then disappears



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