//+------------------------------------------------------------------+
//|                                                           FP.mq4 |
//|                                 Copyright © 2006, Nick A. Zhilin |
//|                                              rebus@dialup.etr.ru |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2006, Nick A. Zhilin"
#property link      "rebus@dialup.etr.ru"
//----
extern int IPeriod=100;
//----
#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 Yellow
#property indicator_color2 Red
#property indicator_color3 Aqua
//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
   IndicatorShortName("Float Pivot");
//---- indicators
   SetIndexStyle(0,DRAW_LINE);
   SetIndexBuffer(0,ExtMapBuffer1);
   SetIndexLabel(0,"Pivot");
   SetIndexStyle(1,DRAW_LINE);
   SetIndexBuffer(1,ExtMapBuffer2);
   SetIndexLabel(1,"HL1");
   SetIndexStyle(2,DRAW_LINE);
   SetIndexBuffer(2,ExtMapBuffer3);
   SetIndexLabel(2,"HL2");
//----
   Comment("FloatPivot("+IPeriod+")");
//----
   return(0);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int deinit()
  {
   Comment("");
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Float Pivot                                                      |
//+------------------------------------------------------------------+
int start()
  {
   int counted_bars=IndicatorCounted();
   if(counted_bars<0) return(-1);
   if(counted_bars>0) counted_bars--;
   int i=Bars-counted_bars;
   if(counted_bars==0) i-=1+MathMax(3,IPeriod);

   while(i>=0)
     {
      double max=High[Highest(NULL, 0, MODE_HIGH, IPeriod, i)];
      double min=Low[Lowest(NULL, 0, MODE_LOW, IPeriod, i)];
      double pivot=(Close[i+1]+Close[i+2]+Close[i+3])/3;
      // Pivot
      ExtMapBuffer1[i]=(max+min+pivot)/3;
      // (R1 - Pivot) / 2
      ExtMapBuffer2[i]=((2*(max+min+pivot)/3-min)+
                        (max+min+pivot)/3)/2;
      // (Pivot - S1) / 2
      ExtMapBuffer3[i]=((max+min+pivot)/3+
                        (2*(max+min+pivot)/3-max))/2;
      i--;
     }
//----
   return(0);
  }
//+------------------------------------------------------------------+