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How to extract only the bottoms turnaround points extracted by the zigzag indicator?

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 Dear all, How to modify the code to show only the bottoms of the zigzag ?

The following code below can successfully extract the tops extracted by zigzag indicator.tops[] has been specified as the index buffer in the init() function....But is it possible to only show the bottoms of lower turn point by modifying the second last parameter of the iCustom call? If the answer is no. then what should I do in MT4 platform? I have tried to take 0, and 2 as the second last parameter, but the result is not i wanted....

My code is attached for your convenience. And I have simplified it as much as I can... Thanks a lot for your time and consideration.
int start()
{
  int counted_bars=IndicatorCounted();
  int limit=0;
  limit = Bars-counted_bars;
  
  for(int shift=limit-1;shift>=0;shift--)
  {
    tops[shift]=iCustom (NULL,0,"ZigZag", 12,5,3, 1, shift);
    if(tops[shift]>0.1) tops[shift]=tops[shift];
  }
  
  return(0);
}

like comparing

double K = iCustom(Symbol(),0,"zigzag",ExtDepth,ExtDeviation,ExtBackstep,0,i);
if (K==Low[i] && K>0)  //..low zigzag......  

deVries,

Thanks a lot for your prompt reply.  do you mean simply change the second last parameter of iCustom to 0? I have tried this before. and The result is definitely not what I desired...To make my question clearer, i show the two figures below to illustrate my question....

.FIg.1 Undesired tops(A.B.C.D.e) are shown in the above figure. 

Fig1. unwanted tops are shown when I want to only show the botoms! I want to filter out all the unwanted tops when I only want to show the bottoms.

Fig2. Only desired tops are shown 

FIg2. The desired tops are shown without any unwanted bottoms. This is the result that i want to have.

So my question is: is it possible to show only the bottom points without showing  Point A/B/C/D/E ? I hope I have made the question clear.....

Thanks a lot for your prompt reply.... 

//+------------------------------------------------------------------+
//|                                                      Zigzag2.mq4 |
//|                 Copyright © 2005-2007, MetaQuotes Software Corp. |
//|                                       http://www.metaquotes.net/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2007, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net/"

#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 Red
#property indicator_color2 Magenta
#property indicator_color3 LightSkyBlue


//---- indicator parameters
extern int ExtDepth=12;
extern int ExtDeviation=5;
extern int ExtBackstep=3;
//---- indicator buffers
double ZigzagBuffer[];
double HighMapBuffer[];
double LowMapBuffer[];
int level=3; // recounting's depth 
bool downloadhistory=false;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
   IndicatorBuffers(3);
//---- drawing settings
   SetIndexStyle(0,DRAW_SECTION);
   SetIndexStyle(1,DRAW_SECTION);   
   SetIndexStyle(2,DRAW_SECTION);   
//---- indicator buffers mapping
   SetIndexBuffer(0,ZigzagBuffer);
   SetIndexBuffer(1,HighMapBuffer);
   SetIndexBuffer(2,LowMapBuffer);
   SetIndexEmptyValue(0,0.0);
   SetIndexEmptyValue(1,0.0);   
   SetIndexEmptyValue(2,0.0);   

//---- indicator short name
   IndicatorShortName("ZigZag("+ExtDepth+","+ExtDeviation+","+ExtBackstep+")");
//---- initialization done
   return(0);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int start()
  {
   int i, counted_bars = IndicatorCounted();
   int limit,counterZ,whatlookfor;
   int shift,back,lasthighpos,lastlowpos;
   double val,res;
   double curlow,curhigh,lasthigh,lastlow;

   if (counted_bars==0 && downloadhistory) // history was downloaded
     {
      ArrayInitialize(ZigzagBuffer,0.0);
      ArrayInitialize(HighMapBuffer,0.0);
      ArrayInitialize(LowMapBuffer,0.0);
     }
   if (counted_bars==0) 
     {
      limit=Bars-ExtDepth;
      downloadhistory=true;
     }
   if (counted_bars>0) 
     {
      while (counterZ<level && i<100)
        {
         res=ZigzagBuffer[i];
         if (res!=0) counterZ++;
         i++;
        }
      i--;
      limit=i;
      if (LowMapBuffer[i]!=0) 
        {
         curlow=LowMapBuffer[i];
         whatlookfor=1;
        }
      else
        {
         curhigh=HighMapBuffer[i];
         whatlookfor=-1;
        }
      for (i=limit-1;i>=0;i--)  
        {
         ZigzagBuffer[i]=0.0;  
         LowMapBuffer[i]=0.0;
         HighMapBuffer[i]=0.0;
        }
     }
      
   for(shift=limit; shift>=0; shift--)
     {
      val=Low[iLowest(NULL,0,MODE_LOW,ExtDepth,shift)];
      if(val==lastlow) val=0.0;
      else 
        { 
         lastlow=val; 
         if((Low[shift]-val)>(ExtDeviation*Point)) val=0.0;
         else
           {
            for(back=1; back<=ExtBackstep; back++)
              {
               res=LowMapBuffer[shift+back];
               if((res!=0)&&(res>val)) LowMapBuffer[shift+back]=0.0; 
              }
           }
        } 
      if (Low[shift]==val) LowMapBuffer[shift]=val; else LowMapBuffer[shift]=0.0;
      //--- high
      val=High[iHighest(NULL,0,MODE_HIGH,ExtDepth,shift)];
      if(val==lasthigh) val=0.0;
      else 
        {
         lasthigh=val;
         if((val-High[shift])>(ExtDeviation*Point)) val=0.0;
         else
           {
            for(back=1; back<=ExtBackstep; back++)
              {
               res=HighMapBuffer[shift+back];
               if((res!=0)&&(res<val)) HighMapBuffer[shift+back]=0.0; 
              } 
           }
        }
      if (High[shift]==val) HighMapBuffer[shift]=val; else HighMapBuffer[shift]=0.0;
     }

   // final cutting 
   if (whatlookfor==0)
     {
      lastlow=0;
      lasthigh=0;  
     }
   else
     {
      lastlow=curlow;
      lasthigh=curhigh;
     }
   for (shift=limit;shift>=0;shift--)
     {
      res=0.0;
      switch(whatlookfor)
        {
         case 0: // look for peak or lawn 
            if (lastlow==0 && lasthigh==0)
              {
               if (HighMapBuffer[shift]!=0)
                 {
                  lasthigh=High[shift];
                  lasthighpos=shift;
                  whatlookfor=-1;
                  ZigzagBuffer[shift]=lasthigh;
                  res=1;
                 }
               if (LowMapBuffer[shift]!=0)
                 {
                  lastlow=Low[shift];
                  lastlowpos=shift;
                  whatlookfor=1;
                  ZigzagBuffer[shift]=lastlow;
                  res=1;
                 }
              }
             break;  
         case 1: // look for peak
            if (LowMapBuffer[shift]!=0.0 && LowMapBuffer[shift]<lastlow && HighMapBuffer[shift]==0.0)
              {
               ZigzagBuffer[lastlowpos]=0.0;
               lastlowpos=shift;
               lastlow=LowMapBuffer[shift];
               ZigzagBuffer[shift]=lastlow;
               res=1;
              }
            if (HighMapBuffer[shift]!=0.0 && LowMapBuffer[shift]==0.0)
              {
               lasthigh=HighMapBuffer[shift];
               lasthighpos=shift;
               ZigzagBuffer[shift]=lasthigh;
               whatlookfor=-1;
               res=1;
              }   
            break;               
         case -1: // look for lawn
            if (HighMapBuffer[shift]!=0.0 && HighMapBuffer[shift]>lasthigh && LowMapBuffer[shift]==0.0)
              {
               ZigzagBuffer[lasthighpos]=0.0;
               lasthighpos=shift;
               lasthigh=HighMapBuffer[shift];
               ZigzagBuffer[shift]=lasthigh;
              }
            if (LowMapBuffer[shift]!=0.0 && HighMapBuffer[shift]==0.0)
              {
               lastlow=LowMapBuffer[shift];
               lastlowpos=shift;
               ZigzagBuffer[shift]=lastlow;
               whatlookfor=1;
              }   
            break;               
         default: return; 
        }
     }

   return(0);
  }
//+------------------------------------------------------------------+

It was possible to show only zigzag buffer

zigzag is repainting


see result of this

Here's what i came up with. I haven't checked deVries results above [was doing this when he posted].

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Green
#property indicator_width1 1
#property indicator_color2 Yellow
#property indicator_width2 1

double Bottoms[];
double Toppers[];

int init()
{

   IndicatorBuffers(2);

   SetIndexStyle(0,DRAW_SECTION);
   SetIndexBuffer(0,Bottoms);
   SetIndexEmptyValue(0,0.0);

   SetIndexStyle(1,DRAW_SECTION);
   SetIndexBuffer(1,Toppers);
   SetIndexEmptyValue(1,0.0);

  IndicatorShortName("zz show top & bottom");
  return(0);
}

int deinit()
{
  return(0);
}

int start()
{
  int counted_bars=IndicatorCounted();
  int limit=0;
  limit = Bars-counted_bars;
  
  for(int shift=limit-1;shift>=0;shift--)
  {
    int ExtDepth=12; int ExtDeviation=5; int ExtBackstep=3;
    int ZigzagBuffer=0; int HighMapBuffer=1; int LowMapBuffer=2;
    
    Bottoms[shift]=iCustom(
        Symbol(),0,"ZigZag",
        ExtDepth, ExtDeviation, ExtBackstep,
        LowMapBuffer, shift
    );
    
    Toppers[shift]=iCustom(
        Symbol(),0,"ZigZag",
        ExtDepth, ExtDeviation, ExtBackstep,
        HighMapBuffer, shift
    );
    
    if(Bottoms[shift]>0.1) Bottoms[shift]=Bottoms[shift];
    if(Toppers[shift]>0.1) Toppers[shift]=Toppers[shift];
  }
  
  return(0);
}

 

ubzen:

Here's what i came up with. I haven't checked deVries results above [was doing this when he posted].

 

Nice  ubzen  with help of your code i came to this......

#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 Red
#property indicator_width1 3
#property indicator_color2 Green
#property indicator_width2 3
#property indicator_color3 Yellow
#property indicator_width3 3


//---- indicator parameters
extern int ExtDepth=12;
extern int ExtDeviation=5;
extern int ExtBackstep=3;


double ZigZag[];
double Bottoms[];
double Toppers[];

int init()
{
   IndicatorBuffers(3);

   SetIndexStyle(0,DRAW_SECTION);
   SetIndexBuffer(0,ZigZag);
   SetIndexEmptyValue(0,0.0);
   
   SetIndexStyle(1,DRAW_SECTION);
   SetIndexBuffer(1,Bottoms);
   SetIndexEmptyValue(1,0.0);

   SetIndexStyle(2,DRAW_SECTION);
   SetIndexBuffer(2,Toppers);
   SetIndexEmptyValue(2,0.0);

  IndicatorShortName("zz show top & bottom");
  return(0);
}

int deinit()
{
  return(0);
}

int start()
{
  int counted_bars=IndicatorCounted();
  int limit=0;
  limit = Bars-counted_bars;
  
  for(int shift=limit-1;shift>=0;shift--)
  {
    ZigZag[shift]=iCustom(
        Symbol(),0,"ZigZag",
        ExtDepth, ExtDeviation, ExtBackstep,
        0, shift
    );

    if(ZigZag[shift]>0.1 && Low[shift]==ZigZag[shift]) Bottoms[shift]=ZigZag[shift];
    if(ZigZag[shift]>0.1 && High[shift]==ZigZag[shift]) Toppers[shift]=ZigZag[shift];
  }
  
  return(0);
}

This is giving as Result


now bottoms and tops match all with zigzag

deVries: Nice  ubzen  with help of your code i came to this...... This is giving as Result
Nice job deVries.
Dear all, with your help and kindness, especially from deVries and Ubzen, my indicator successfully drew the picture linking the bottoms turnaround points extracted by the zigzag indicator in this cheerful early spring morning....:)
d



deVries:

Nice ubzen with help of your code i came to this......

This is giving as Result

now bottoms and tops match all with zigzag





Hi deVries,

Thanks a lot for your code. If i want to know how far is the Fibonacci Retracement of the last zigzag leg, compare to the previous zigzag leg. How to do that ?

I want to do like the picture, but the code below that i tried did not make it ...

Thanks,

jack

Fibo retracement


#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 Red
#property indicator_width1 3
#property indicator_color2 Green
#property indicator_width2 3
#property indicator_color3 Yellow
#property indicator_width3 3


//---- indicator parameters
extern int ExtDepth=12;
extern int ExtDeviation=5;
extern int ExtBackstep=3;


double ZigZag[];
double Bottoms[];
double Toppers[];
double resBuffer[][];

//---
int init() {
   IndicatorBuffers(3);

   SetIndexStyle(0,DRAW_SECTION);
   SetIndexBuffer(0,ZigZag);
   SetIndexEmptyValue(0,0.0);
   
   SetIndexStyle(1,DRAW_SECTION);
   SetIndexBuffer(1,Bottoms);
   SetIndexEmptyValue(1,0.0);

   SetIndexStyle(2,DRAW_SECTION);
   SetIndexBuffer(2,Toppers);
   SetIndexEmptyValue(2,0.0);

  IndicatorShortName("zz show top & bottom");
  return(0);
}

int deinit()
{
  ObjectDelete("myFibo");
  return(0);
}

int start()
{
  int counted_bars=IndicatorCounted();
  int limit=0;
  limit = Bars-counted_bars;
  int k=0, m=0;
  int candle1=0, candle2=0;
  double prc1=0, prc2=0;
  
  for(int shift=limit-1;shift>=0;shift--) {
    ZigZag[shift]=iCustom(
        Symbol(),0,"ZigZag",
        ExtDepth, ExtDeviation, ExtBackstep,
        0, shift
    );

    if(ZigZag[shift]>0.1 && Low[shift]==ZigZag[shift]) {
      Bottoms[shift]=ZigZag[shift];
      resBuffer[k][0] = Bottoms[shift];
      resBuffer[k][1] = shift;
      k++;
    }
    if(ZigZag[shift]>0.1 && High[shift]==ZigZag[shift]) {
      Toppers[shift]=ZigZag[shift];
      resBuffer[k][0] = Toppers[shift];
      resBuffer[k][1] = shift;
      k++;
    }
  } // ende for
  
  //---
  for(m=k;m>=0;m--) {
   candle1 = resBuffer[m][1];
   prc1 = resBuffer[m][0];
   candle2 = resBuffer[m-1][1];
   prc2 = resBuffer[m-1][0];
   //---
         ObjectDelete("myFibo");
         ObjectCreate("myFibo", OBJ_FIBO, 0, Time[candle1], prc2, Time[candle2], prc1);
 
  } // ende for
          
  return(0);
}
jackprobe:


Hi deVries,

Thanks a lot for your code. If i want to know how far is the Fibonacci Retracement of the last zigzag leg, compare to the previous zigzag leg. How to do that ?

Thanks,

jack


draw fibonacci this way find the two points with zigzag indicator iCustom

0.0 1.6154

100.0 1.6168

difference 0.0014

last high = 1.6169

difference with 0.0 0.0015 in% 0.0015/0.0014 * 100% = 107% in distance + 0.0001

Is that what you mean ??

Hi deVries,

Thank you. Yes, it's like the picture you sent. But i want to know how to code it. It must calculate each previous Zigzag leg, and then draw the Fibonacci level, so we know how far is the current / last zigzag goes.

edit: i sent the code on the previous post. It would not draw the fibo line ...

Thanks

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