Heikin-Ashi. How to calculate the first Candle?

Quote

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Heikin-Ashi (平均足, Japanese for 'average bar') candlesticks are a weighted version of candlesticks calculated with the following formula:
Open = (open of previous bar+close of previous bar)/2
Close = (open+high+low+close)/4
High = maximum of high, open, or close (whichever is highest)
Low = minimum of low, open, or close (whichever is lowest)

Quoting gspe

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Hi everybody.

I'm trying to implement the calculation of Heikin-Ashi Candle in a Indicator/EA i'm working on.

The Heikin-Ashi Candle formula is simple to implement, from Wikipedia:


The problem is the calculation of the Open because it require that you know the previous candle but if you are calculating the first Candle which value you take?

So I'm curios to know if someone know which of the follow value would be correct:

 

1. 
   The Mid Point of Previous "Normal Candle"

[list][*]
The High / Low of the Previous...

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Quoting Dredding82

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for(int i=1;i<=limit;i++)

// HA Stuff
double HA1=iCustom(Symbol(),0,"Heiken Ashi",2,i);
double HA2=iCustom(Symbol(),0,"Heiken Ashi",3,i);
double HA1a=iCustom(Symbol(),0,"Heiken Ashi",2,i+1);
double HA2a=iCustom(Symbol(),0,"Heiken Ashi",3,i+1);

//+------------------------------------------------------------------+
// Actual Calculation of Conditions to Initiate BUY Entry |
//+------------------------------------------------------------------+

//---Condition 1
HA2>HA1 && HA2a<HA1a - Was a sell 1 candle ago but changed to...

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Quoting gspe

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Thanks Dredd,
is not what i was looking for. I'm looking for a manual calculation of Heiken Ashi Candles, so i can use them without call iCostum, this because iCostum have a big impact on Indicators and EA performance.

The problem is that the calculation of the first Heiken Ashi Candle has an impact on the calculation of the following Heiken Ashi Candles calculation.
So if you start the calculation 10 Bars ago or if you start the calculation 15 Bars ago in the end you'll get different Heiken Ashi Candles.

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//+------------------------------------------------------------------+
//|                                             QuickTest_Script.mq4 |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2010, zznbrm"
#property show_inputs
 
extern int eintBars = 20;
 
double gadblHaOpen[], gadblHaClose[];
 
int start()
{   
   int intBegin, intEnd;
   datetime dtStart = WindowTimeOnDropped();
   int intStart = iBarShift( Symbol(), Period(), dtStart, true );
 
   ArrayResize( gadblHaOpen, eintBars );
   ArrayResize( gadblHaClose, eintBars );
 
   for ( int inx = 0; inx < 5; inx++ )
   {
      intBegin = GetTickCount();
      calcHA( intStart+inx );
      intEnd = GetTickCount();
      Print( intEnd - intBegin, "  ", TimeToStr( Time[intStart+inx], TIME_DATE|TIME_SECONDS ), "  ", 
             DoubleToStr( gadblHaOpen[0], Digits ), "  ", DoubleToStr( gadblHaClose[0], Digits ) );
   }
}
void calcHA( int intShift )
{
   double dblOpen, dblClose; 
   int intRShift = eintBars-1+intShift;
 
   ArrayInitialize( gadblHaOpen, 0.0 );
   ArrayInitialize( gadblHaClose, 0.0 );
 
   gadblHaOpen[eintBars-1] = Open[intRShift];
   gadblHaClose[eintBars-1] = Close[intRShift];
 
   for ( int inx = eintBars-2; inx >= 0; inx-- )
   { 
      intRShift = intShift+inx;
 
      dblOpen = ( gadblHaOpen[inx+1] + gadblHaClose[inx+1] ) / 2;
      dblClose = ( Open[intRShift] + High[intRShift] + Low[intRShift] + Close[intRShift] ) / 4;
      gadblHaOpen[inx] = dblOpen;
      gadblHaClose[inx] = dblClose;
   }
}

Quote

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if(Bars<=200) return(0);
ExtCountedBars=IndicatorCounted();
if (ExtCountedBars<0) return(-1);
if (ExtCountedBars>0) ExtCountedBars--;
int pos=MathMax(Bars-ExtCountedBars-1,200);
while(pos>=0) {
haOpen=(haOpen+haClose)/2;
haClose=(Open[pos]+High[pos]+Low[pos]+Close[pos])/4;
haHigh=MathMax(High[pos], MathMax(haOpen, haClose));
haLow=MathMin(Low[pos], MathMin(haOpen, haClose));
double top = MathMax(Open[pos],Close[pos]);
double bot = MathMin(Open[pos],Close[pos]);
if (Open[pos]==Close[pos]) top = top + 0.1 * pointz; //Handles doji's
if (haOpen<haClose) { // Green candle
ExtMapBuffer1[pos]=Low[pos];
ExtMapBuffer2[pos]=High[pos];
ExtMapBuffer3[pos]=bot;
ExtMapBuffer4[pos]=top;
} else { // Red candle
ExtMapBuffer1[pos]=High[pos];
ExtMapBuffer2[pos]=Low[pos];
ExtMapBuffer3[pos]=top;
ExtMapBuffer4[pos]=bot;
}
pos--;
}
//sound / alert, added by Tater_Tha_Great
if(SoundOn) {
if(Time[0]>LastAlert) {
if(ExtMapBuffer3[1]>ExtMapBuffer4[1] && ExtMapBuffer3[2]<=ExtMapBuffer4[2] && StochMain < StochSignal) {
LastAlert = Time[0];
Alert("Freebie Candle Alert (", Symbol(), ", ", Period(), ")--Possible SELL ");
if (SendEmail)
SendMail("Freebie Candle Alert ", " " + Symbol() + " (" + Period() + ") -- Possible SELL");
}
else if(ExtMapBuffer3[1]<ExtMapBuffer4[1] && ExtMapBuffer3[2]>=ExtMapBuffer4[2] && StochMain > StochSignal) {
LastAlert = Time[0];
Alert("Freebie Candle Alert (", Symbol(), ", ", Period(), ")--Possible BUY ");
if (SendEmail)
SendMail("Freebie Candle Alert ", " " + Symbol() + " (" + Period() + ") -- Possible BUY");
}
}
}
//----
return(0);
}

Quoting zznbrm

Disliked

{quote} Use the bar's open/close for the HA open/close of the first bar...then all subsequent bars will feed off of that. From my testing, using 10 or less bars in your calculation leads to some errors. Using 20 bars pretty much guarantees accuracy. Here's a test script for the method I use: //+------------------------------------------------------------------+ //| QuickTest_Script.mq4 | //+------------------------------------------------------------------+ #property copyright "Copyright 2010, zznbrm" #property show_inputs extern int eintBars...

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