It Return nothing
SECTION_BEGIN("Z Trailing Stop");
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = FullName()+StrFormat(" {{NAME}} - {{INTERVAL}} {{DATE}}
Open %g, Hi %g, Lo %g, Close %g (%.1f%%) {{VALUES}}", O, H, L, C,
SelectedValue( ROC( C, 1 ) ) ));
Plot( C,"Price",colorBlack,64 );
function HigherLow(Bars,Price)
{
HLow=Price;
HLowArr=Null;
if(Bars>0 AND bars<BarCount)
{
for(i=bars+1;
i<BarCount;i++)
{
if(Low[i] >= HLow)
{
HLow=Low[i];
HLowArr[i]=HLow;
}
else
HlowArr[i]=HLow;
}
}
return HlowArr;
}
Start = SelectedValue(BarIndex());
Price=ValueWhen(BarIndex()==start,L,1);
Test=HigherLow(Start,Price);
Plot(IIf(start,Test,Null),"StopLoss",colorRed,4);
_SECTION_END();