single candle diverson for Amibroker (AFL)

_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", colorBlack ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() ); 
_SECTION_END();

_SECTION_BEGIN("Price");
c1 = RSI(14) ;
C2 = 

Short1 =  C1 < Ref(C1,-1) AND H > Ref(H,-1) ;
Buy1 =  C1 > Ref(C1,-1) AND L < Ref(L,-1) ;

PlotShapes(short1*shapeDownArrow,colorRed,0,H,-12);
PlotShapes(buy1*shapeUpArrow,colorBlue,0,L,-12);

Plot(EMA(C,20),"",IIf(EMA(C,20)>Ref(EMA(C,20),-1),colorLime,colorRed),styleLine);
Plot(BBandTop(C,20,2),"",colorWhite,styleLine);
Plot(BBandBot(C,20,2),"",colorWhite,styleLine);

Short2 = Short1 AND (EMA(C,20)<Ref(EMA(C,20),-1) OR EMA(C,50)<Ref(EMA(C,50),-1) OR MA(C,50)<Ref(MA(C,50),-1));
Buy2 = Buy1 AND (EMA(C,20)>Ref(EMA(C,20),-1) OR EMA(C,50)>Ref(EMA(C,50),-1) OR MA(C,50)>Ref(MA(C,50),-1)) ;
PlotShapes(short2*shapeDownArrow,colorYellow,0,H,-22);
PlotShapes(buy2*shapeUpArrow,colorRed,0,L,-22);

Filter  = Buy1 == 1 OR Short1 == 1 OR Buy2 == 1 OR Short2 == 1;
AddColumn(Buy1,"Buy1",1,colorWhite,IIf(Buy1==0,colorWhite,colorLime)) ; 
AddColumn(Short1,"Short1",1,colorWhite,IIf(Short1==0,colorWhite,colorRed)) ; 
AddColumn(Buy2,"Buy2",1,colorWhite,IIf(Buy2==0,colorWhite,colorLime)) ; 
AddColumn(Short2,"Short2",1,colorWhite,IIf(Short2==0,colorWhite,colorRed)) ;
_SECTION_END();