Hanover replies to PMs

Quoting waimaj

Disliked

Is it possible to code an indicator or (preferably)void function that highlights and alerts the squeeze zones of two ema's of two different timeframes?. .

Ignored

Quoting hanover

Disliked

{quote} If, by "highlights the squeeze zones" you mean shading in the area between two EMA lines, this thread might help you. I assume that one of the lines could potentially be a MTF EMA, which would make the code more complex, but I expect it would still be possible, although I've never attempted anything like it myself. An alert is simply a function that triggers a popup, e-mail or push notification when price reaches a calculated value, hence that should be potentially programmable,...

Ignored

Quoting waimaj

Disliked

I mean by "highlighting" changing the background color of prices as long as sqweeze is valid (that color should appear on lower timeframes) in addition to the alerts.

Ignored

Quoting joelloh

Disliked

Hi Hanover, I need your advise on mql4 programming. Question: How to calculate the distance pips by given 2 market price. Example: (1.2888) and (1.2800) = 88pips What is the coding structure for calculated the distance pips. Regards.

Ignored

double pip;
int OnInit()
{
   if(_Digits == 5 || _Digits == 3)
      pip = _Point * 10;
   else 
      pip = _Point;
   
   return(INIT_SUCCEEDED);
}
void OnTick()
{
   double pip_difference = (High[0] - Low[0]) / pip;
   pip_difference = NormalizeDouble(pip_difference,1);
}

Quoting Botan626

Disliked

Hello, David! Can't get help from "I will code your EAs and Indicators for no charge" thread. Could you try, please? The HA candles, how is calculated the open price of the very first HA candle on any given chart? {file}

Ignored

 if(prev_calculated>1)
      pos=prev_calculated-1;
   else
     {
      //--- set first candle
      if(open[0]<close[0])
        {
         ExtLowHighBuffer[0]=low[0];
         ExtHighLowBuffer[0]=high[0];
        }
      else
        {
         ExtLowHighBuffer[0]=high[0];
         ExtHighLowBuffer[0]=low[0];
        }
         ExtOpenBuffer[0]=open[0];
         ExtCloseBuffer[0]=close[0];
      //---
      pos=1;
     }

Quoting Nicholishen

Disliked

{quote} Dude, I already told you in the other thread. The earliest candle on the chart HA open = first bar open. if(prev_calculated>1) pos=prev_calculated-1; else { //--- set first candle if(open[0]<close[0]) { ExtLowHighBuffer[0]=low[0]; ExtHighLowBuffer[0]=high[0]; } else { ExtLowHighBuffer[0]=high[0]; ExtHighLowBuffer[0]=low[0]; } ExtOpenBuffer[0]=open[0]; ExtCloseBuffer[0]=close[0]; //--- pos=1; }

Ignored

Quoting Botan626

Disliked

The HA candles, how is calculated the open price of the very first HA candle on any given chart?

Ignored

Quoting hanover

Disliked

{quote} The only additional help that a programmer can offer is to look at the indicator code, and try to ascertain what it is doing.

Ignored

Quote

Disliked

Assuming that when you say "the very first HA candle", you mean the one that is currently forming at the far right of the chart, then post #709 correctly shows the code that generates that candle

Quoting Nicholishen

Disliked

{quote} Dude, I already told you in the other thread. The earliest candle on the chart HA open = first bar open. if(prev_calculated>1) pos=prev_calculated-1; else { //--- set first candle if(open[0]<close[0]) { ExtLowHighBuffer[0]=low[0]; ExtHighLowBuffer[0]=high[0]; } else { ExtLowHighBuffer[0]=high[0]; ExtHighLowBuffer[0]=low[0]; } ExtOpenBuffer[0]=open[0]; ExtCloseBuffer[0]=close[0]; //--- pos=1; }

Ignored

Quoting hanover

Disliked

{quote}However, as a separate issue, I believe that your indicator is calculating HA wrongly. The HA value for any candle should be calculated from the values of the candle on its immediate left, not its immediate right. The correct formula for Heiken Ashi is given here (note how it says "2. Open = (Average of Open Price and Close Price of the previous bar)"). I've attached an old HA indicator that calculates the values correctly. You can...

Ignored

Quoting Botan626

Disliked

But I am asking about, for e.g., this candle on 1990.07.06 on GBPUSD daily chart. I guess, the candle that is currently forming at the far right of the chart should be called the "last" candle, am I wrong?

Ignored

Quoting hanover

Disliked

{quote} Sorry, I was thinking like a programmer, not a trader. As a programmer, I read charts from right to left. As a trader, from left to right. When I read your indicator's MQL4 code, it looks like each HA candle is being calculated from the OHLC of the candle on its immediate RIGHT, whereas (according to the formulae given in both your link, and my link) it should be calculated from the candle on its immediate LEFT (the "previous" bar). Hence I believe your indicator is using the wrong calculation. In other words, your 1990.07.06 HA candle is...

Ignored

haOpen=(ExtOpenBuffer[i-1]+ExtCloseBuffer[i-1])/2;

Quote

Disliked

(Note: in your screenshot, you need to change the chart to a line chart if you want to see the HA open and close clearly, otherwise it gets hidden behind the actual candle's open and close).

Quoting Botan626

Disliked

You edited your post and attached new file, in this file indicator uses the same formula used in the indi I attached (not Average).

Ignored

//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   double haOpen, haHigh, haLow, haClose;
   if(Bars<=10) return(0);
   ExtCountedBars=IndicatorCounted();
//---- check for possible errors
   if (ExtCountedBars<0) return(-1);
//---- last counted bar will be recounted
   if (ExtCountedBars>0) ExtCountedBars--;
   int pos=Bars-ExtCountedBars-1;
   while(pos>=0)                                                // this is processing from LEFT to RIGHT, i.e. process while pos >=0 (0 is the rightmost candle)
     {
      haOpen=(ExtMapBuffer3[pos+1]+ExtMapBuffer4[pos+1])/2;     // average of HAopen and HAclose of the candle to the LEFT (pos+1 is the next candle to the LEFT)
      haClose=(Open[pos]+High[pos]+Low[pos]+Close[pos])/4;      // average of O, H, L C of the actual (not HA) candle (pos is the current candle)
      haHigh=MathMax(High[pos], MathMax(haOpen, haClose));      // highest of: the actual high of the current candle, HAopen (of candle on LEFT), HAclose (of candle on LEFT)
      haLow=MathMin(Low[pos], MathMin(haOpen, haClose));        // lowest of: the actual low of the current candle, HAopen (of candle on LEFT), HAclose (of candle on LEFT)
      if (haOpen<haClose)
        {
         ExtMapBuffer1[pos]=haLow;
         ExtMapBuffer2[pos]=haHigh;
        }
      else
        {
         ExtMapBuffer1[pos]=haHigh;
         ExtMapBuffer2[pos]=haLow;
        }
      ExtMapBuffer3[pos]=haOpen;
      ExtMapBuffer4[pos]=haClose;
    pos--;                                                   // subtracting 1 from pos is processing the candles from LEFT to RIGHT
     }
//----
   return(0);
  }

Quote

Disliked

Well, when I read the code and I see: haOpen=(ExtOpenBuffer[i-1]+ExtCloseBuffer[i-1])/2; I interpret it as for the current candle the indi takes Open and Close of the previous HA candle and calculates the open for current HA candle. I think the part "[i-1]" tells it.

Quoting hanover

Disliked

{quote} In my original post, I attached the ex4 file. In my edited post, I attached the mq4 file, after I found that it compiled without errors on the latest MT4 build (even though the indicator was written before build 600). Your indicator processes the candles from RIGHT to LEFT, and uses the values on the candle to the RIGHT to calculate the HA values for the current candle. The indicator I supplied correctly processes the candles from LEFT to RIGHT, using the values of the candle on the LEFT to calculate the HA values for the current candle....

Ignored

Quoting Botan626

Disliked

And mine and yours indicator plot exactly the same HA candles, I can't comment on the code and tell how they both do their job. ............... how is calculated the open price of the very 1st on the left HA candle?

Ignored

Quoting hanover

Disliked

{quote} I just noticed that your indicator uses the ArraySetAsSeries() command, which apparently has the capability of reversing the sequencing (i.e. from left to right, or right to left). I've never used this before, but I expect that it explains why both indicators are giving the same result. Hence I'm unable to answer your original question, as I don't know which candle MQL4 sees as the "first" candle . Ignore my previous comments; I apologize for the gaps in my knowledge.

Ignored