Modified MACD Bollinger Band Composite - Amibroker AFL Code

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_SECTION_BEGIN("macd BB");

 
A2=MACD(9,34); 
BBtop=BBandTop(A2,5,.5);  
BBbot=BBandBot(A2,5,.5);
Color=IIf(a2 > bbtop, colorBlue,IIf(a2 < bbbot, colorRed,colorYellow));
bbtop_col = IIf (BBtop > Ref(BBtop,-1),colorBlue,colorRed);
bbbot_col = IIf (BBbot > Ref(BBbot,-1),colorBlue,colorRed);
Plot(a2,"",color,styleLine);
Plot(BBtop,"",BBtop_col,styleDashed);
Plot(BBbot,"",BBbot_col,styleDashed);
Buy = a2 > bbtop;
Sell = a2 < bbbot;
Buy = ExRem(Buy,Sell);
Sell = ExRem(Sell,Buy);

PlotShapes(Buy*shapeHollowSmallUpTriangle,colorYellow);
PlotShapes(Sell*shapeHollowSmallDownTriangle,colorYellow);
Plot(6, "", Color, styleOwnScale| styleArea|styleNoLabel,-0.5,100);
_SECTION_END();