sorting the Low value series

#1
First Post: Nov 14, 2010 3:27am Nov 14, 2010 3:27am

kaza007
| Joined Mar 2009 | Status: Trader | 46 Posts

Hi all,
hopefully this post is in the correct place.

I need some help on how to sort the values of a series array such as the Low array. Here is my code so far.

For a start I am trying to work on the first 3 Lows of the chart.
Low[0], Low[1] and Low[2]
The ArrayCopyRates works OK.
I am using ArrayCopy because you cannot sort a series array.
but when the values get printed out they are some random values I have no idea where they have come from.

Am I going about this the right way or is there a better way?

Inserted Code

int start()
  {
   double arrayLows[3][6];
   double arrayLows2[3][6];
//----
      ArrayCopyRates(arrayLows,Symbol(),PERIOD_D1);
      ArrayCopy(arrayLows2,arrayLows);
      ArraySort(arrayLows2);
   for(int x=0;x<=2;x++)
      {
      double  tempLow=arrayLows2[x][2];
      Print("value: "+tempLow);
      }
//----
   return(0);
  }

#2
Nov 14, 2010 9:12am Nov 14, 2010 9:12am

sangmane
Joined Apr 2009 | Status: MT4 Programmer | 758 Posts

hi kaza,

what you got aren't random values. in your code, arrayLows2 was sorted based on time. so, the result are the first 3 bar's low on your daily chart, measured from the left most bar.

you can try this way:

PHP Code

   double arrayLows[], arrayLows2[1];
//----
      int arrSize = ArrayCopySeries(arrayLows,MODE_LOW,Symbol(),PERIOD_D1);
      ArrayCopy(arrayLows2,arrayLows);
      ArraySort(arrayLows2);
   for(int x=0;x<arrSize;x++)
      {
      double  tempLow=arrayLows2[x];
      Print("value: "+tempLow);
      }
//----

hope this help

#3
Nov 14, 2010 9:37am Nov 14, 2010 9:37am

CodersGuru
Joined Nov 2006 | Status: Trader | 124 Posts | Online Now

I don't think you need ArrayCopyRates to get the lowest value for the previous x bars.

Use this function to get the lowest low value for x bars:

PHP Code


void GetLowest(int start, int end, int& bar, double& value)
{
   double l=20000;
   int w=0;
   for (int cnt = start ; cnt <=end ; cnt++)
   {
      if (Low[cnt]<l)
      {
        l=Low[cnt];
        w=cnt; 
      }
   }
   bar = w;
   value = l;
}

Stop asking ChatGPT for broken MQL code. VisualMQL it instead.

#4
Last Post: Nov 15, 2010 5:51am Nov 15, 2010 5:51am

kaza007
| Joined Mar 2009 | Status: Trader | 46 Posts

Thanks for the ideas guys.
You got me looking in the right places and I found my solution.

Inserted Code

   int NumberOfValues=3;
   double arrayLows[],arrayLowsTemp[];
   ArrayCopySeries(arrayLowsTemp,MODE_LOW,Symbol(),PERIOD_D1);
   ArrayCopy(arrayLows,arrayLowsTemp,0,1,NumberOfValues);
   ArraySort(arrayLows,NumberOfValues,0,MODE_ASCEND);
 
   for(int x=0;x<=NumberOfValues-1;x++)
      {
      double  tempLow=arrayLows[x];
      Print("value: "+tempLow);
      }

I was looking to sort the low values starting at the i+1 value to i+n.
I need them sorted because I would like to do a Median calc on them.
Not Mean (or Average) but Median (middle) value.

Thanks again.

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sorting the Low value series
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