Trend Reversal Identifier System - Amibroker AFL Code

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_SECTION_BEGIN("Marketcalls - Counter Trend Reversal System");
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 ) ) ));

z=(High+Low+(Close)*(2))/(4);
EMAavg=((34*EMA(z,2)+21*EMA(z,3))+(13*EMA(z,5))+(8*EMA(z,8))+(5*EMA(z,13))+(3*EMA(z,21))+(2*EMA(z,34)))/(87);
Plot(EMAavg,"EMAavg=",colorRed);



Buy =C>EMAavg AND C>EMA(C,5);
ex =C<EMAavg;



Buy = ExRem( Buy, ex );
ex = ExRem( ex, Buy ); 



Filter =  Buy;
/* Exploration Parameters */
AddTextColumn( FullName(), "Company Name" );
AddColumn( Buy, "Buy", 1 );
AddColumn( C, "Close", 1.3 );


PlotShapes(IIf(Buy, shapeSquare, shapeNone),colorGreen, 0, L, Offset=-40);
PlotShapes(IIf(Buy, shapeSquare, shapeNone),colorLime, 0,L, Offset=-50);                      
PlotShapes(IIf(Buy, shapeUpArrow, shapeNone),colorWhite, 0,L, Offset=-45); 
//PlotShapes(IIf(Sell, shapeSquare, shapeNone),colorRed, 0, H, Offset=40);
//PlotShapes(IIf(Sell, shapeSquare, shapeNone),colorOrange, 0,H, Offset=50);                      
//PlotShapes(IIf(Sell, shapeDownArrow, shapeNone),colorWhite, 0,H, Offset=-45);

Plot( C, "Close", ParamColor("Color", colorBlack ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() ); 

_SECTION_END();