(NEED HELP) : Error 10. Subscript out of range

dear all, please help me to fix this error..what should i change the code :



_SECTION_BEGIN("Price");
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g, Close %g (%.1f%%) {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 ) ) ));
Plot( C, "Close", ParamColor("Color", colorDefault ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() );
_SECTION_END();

_SECTION_BEGIN("AA - Fibonacci Retracements and Goals");
///////////////////////////////////////////////////
// **************** Parameters ********************
//
Period = Param("Period", 1, 1, 50);
ShowExt = ParamToggle("Show Extension ?", "No|Yes");
///////////////////////////////////////////////////
// **************** Calculations *****************
//
Period = Period*(13*.618);

Hhb = LastValue(Ref(HHVBars(H, Period), -1))+1;
Llb = LastValue(Ref(LLVBars(L, Period), -1))+1;
Hv = LastValue(Ref(HHV(H, Period), -1));
Lv = LastValue(Ref(LLV(L, Period), -1));

Range = (Hv - Lv);
LText = "0 %, 21.4 %, 38.2 %, 50 %, 61.8 %, 78.6 %, 100 %, 1.618 %, 1.72 %, 200 %";
if(Hhb > Llb)
{
Levels[0] = Lv;
Levels[1]= (Range *.214)+Levels[0];
Levels[2]= (Range *.382)+Levels[0];
Levels[3]= (Range *.5)+Levels[0];
Levels[4]= (Range *.618)+Levels[0];
Levels[5]= (Range *.786)+Levels[0];
Levels[6]= Hv;
Levels[7]= (Range *.618)+Levels[6];
Levels[8]= (Range *.72)+Levels[6];
Levels[9]= (Range )+Levels[6];
x0 = BarCount - 1 - Llb;
x1 = BarCount - 1 - Hhb;
}
else
{
Levels[0]= Hv;
Levels[1]= Levels[0]- (Range *.214);
Levels[2]= Levels[0]- (Range *.382);
Levels[3]= Levels[0]- (Range *.5);
Levels[4]= Levels[0]- (Range *.618);
Levels[5]= Levels[0]- (Range *.786);
Levels[6]= Lv;
Levels[7]= Levels[6]- (Range *.618);
Levels[8]= Levels[6]- (Range *.72);
Levels[9]= Levels[6]- (Range );
x0 = BarCount - 1 - Hhb;
x1 = BarCount - 1 - Llb;
}

//////////////////////////////////////////////////////////////////////////////////////
/// **************************** Plotting Area ********************************
//
//Plot(C, "", IIf(C > O, colorBrightGreen, colorRed), ParamStyle("Price Style", styleBar, maskPrice));
for(i=0; i<10; i++)
{
if(i!=6)
x = x0;
else
x = x1;
if(i<7 OR ShowExt)
{
Plot(LineArray(x, Levels, BarCount, Levels), "", i+2, styleDots);
PlotText(StrExtract(LText, i), BarCount, Levels, i+2);
}
}
Title = FullName()+" - "+Name()+"\nO:"+O+", H:"+H+", L:"+L+", C:"+C;
_SECTION_END();

Buy = LastValue(Ref(LLV(L, Period), -1));

I don't get an error. What line does the error occur? You might also try a different symbol to see if the symbol's data is a problam.