Afl help needed

_SECTION_BEGIN("Price");

GraphXSpace=5;
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g, Close %g (%.1f%%) Vol " +WriteVal( V, 1.0 ) +" {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 )) ));
Plot( C, "Close", ParamColor("Color", colorBlack ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() ); 

_SECTION_END();
p=9;
Buy=PDI(p)>MDI(p) AND CCI(p)>100 AND ADX(p)>15;
Sell=PDI(p)<MDI(p) AND CCI(p)< -100 AND ADX(p)>15;
Buy = ExRem(Buy, Sell);
Sell = ExRem(Sell, Buy);

PlotShapes(IIf(Buy, shapeUpTriangle, shapeNone),colorGreen, 0,L, Offset=-12);
                PlotShapes(IIf(Sell, shapeDownTriangle, shapeNone),colorRed, 0,H, Offset=-12);