Composite Heikin Ashi Bollinger Band - Amibroker AFL Code

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//---- heikin ashi
HaClose = (O+H+L+C)/4; 
HaOpen = AMA( Ref( HaClose, -1 ), 0.3 ); 
HaHigh = Max( H, Max( HaClose, HaOpen ) ); 
HaLow = Min( L, Min( HaClose, HaOpen ) ); 
xDiff = (HaHigh - Halow) * IIf(StrFind(Name(),"JPY"),100,10000);
barcolor = IIf(HaClose >= HaOpen,colorGreen,colorRed);
PlotOHLC( HaOpen, HaHigh, HaLow, HaClose, "", barcolor, styleCandle ); 
// Plot(EMA(HaClose,9),"",colorWhite, styleLine);
// Plot(EMA(HaClose,18),"",colorBlack, styleLine);

_SECTION_BEGIN("Bollinger Bands");
P = ParamField("Price field",-1);
Periods = Param("Periods", 15, 2, 100, 1 );
Width = Param("Width", 2, 0, 10, 0.05 );
Color = ParamColor("Color", colorCycle );
Style = ParamStyle("Style");
Plot( BBandTop( P, Periods, Width ), "BBTop" + _PARAM_VALUES(), Color, Style );

Plot( BBandBot( P, Periods, Width ), "BBBot" + _PARAM_VALUES(), Color, Style );

_SECTION_END();

_SECTION_BEGIN("MA1");
P = ParamField("Price field",-1);
Periods = Param("Periods", 15, 2, 200, 1, 10 );
Plot( MA( P, Periods ), _DEFAULT_NAME(), ParamColor( "Color", colorCycle ),
ParamStyle("Style") );
_SECTION_END();