/*
	Heikin-Ashi(Koma-Ashi) with Moving Average Type
*/
SetChartOptions(2, chartWrapTitle);

// Calculate Moving Average
MAPeriod = Param("MA Period", 15, 1, 100);
MAOpen = EMA(Open, MAPeriod);
MAHigh = EMA(High, MAPeriod);
MALow = EMA(Low, MAPeriod);
MAClose = EMA(Close, MAPeriod);

HaClose = (MAOpen + MAHigh + MALow + MAClose) / 4;
HaOpen = AMA(Ref(HaClose, -1), 0.5);

// for graph collapse
for(i = 0; i <= MAPeriod; i++) HaClose[i] = Null;
/*
// same 
// HaOpen = (Ref(HaOpen, -1) + Ref(HaClose, -1)) / 2;
HaOpen[ 0 ] = HaClose[ 0 ]; 
for(i = 1; i < BarCount; i++) { 
    HaOpen[i] = (HaOpen[i - 1] + HaClose[i - 1]) / 2;
} 
*/

HaHigh = Max(MAHigh, Max(HaClose, HaOpen)); 
HaLow = Min(MALow, Min(HaClose, HaOpen)); 

// outs comments
"BarIndex = " + BarIndex();
"Open = " + Open;
"High = " + High;
"Low = " + Low;
"Close = "+ Close;
"HaOpen = " + HaOpen;
"HaHigh = " + HaHigh;
"HaLow = " + HaLow;
"HaClose = "+ HaClose;

// Plot graphs
_N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} HaOpen %g, HaHigh %g,
HaLow %g, HaClose %g (%.1f%%) {{VALUES}}", 
   HaOpen, HaHigh, HaLow, HaClose, SelectedValue(ROC( HaClose, 1))));
PlotOHLC(HaOpen, HaHigh, HaLow, HaClose, _DEFAULT_NAME(), ParamColor("Color",
colorBlack), styleCandle);
_SECTION_END();