//+------------------------------------------------------------------+
//|                                                    Objective.mq4 |
//|                                         Copyright © 2011, LeMan. |
//|                                                 b-market@mail.ru |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2011, LeMan."
#property link      "b-market@mail.ru"

#property indicator_chart_window
#property indicator_buffers 8
#property indicator_color1 Red
#property indicator_color2 Red
#property indicator_color3 Red
#property indicator_color4 Red
#property indicator_color5 Green
#property indicator_color6 Green
#property indicator_color7 Green
#property indicator_color8 Green
#property indicator_style1 2
#property indicator_style2 2
#property indicator_style3 2
#property indicator_style4 2
#property indicator_style5 2
#property indicator_style6 2
#property indicator_style7 2
#property indicator_style8 2
//----
extern int Sample = 20;
extern double Quartile_1 = 25.0;
extern double Quartile_2 = 50.0;
extern double Quartile_3 = 75.0;
//----
double q1Buffer[];
double q2Buffer[];
double q3Buffer[];
double q4Buffer[];
double q5Buffer[];
double q6Buffer[];
double q7Buffer[];
double q8Buffer[];
//+------------------------------------------------------------------+
int init() {
//----  
   IndicatorBuffers(8);
   IndicatorDigits(Digits);
//---- indicators
   SetIndexBuffer(0, q1Buffer);
   SetIndexBuffer(1, q2Buffer);
   SetIndexBuffer(2, q3Buffer);
   SetIndexBuffer(3, q4Buffer);
   SetIndexBuffer(4, q5Buffer);
   SetIndexBuffer(5, q6Buffer);
   SetIndexBuffer(6, q7Buffer);
   SetIndexBuffer(7, q8Buffer);
//---   
   SetIndexStyle(0, DRAW_LINE);
   SetIndexStyle(1, DRAW_LINE);
   SetIndexStyle(2, DRAW_LINE);
   SetIndexStyle(3, DRAW_LINE);
   SetIndexStyle(4, DRAW_LINE);
   SetIndexStyle(5, DRAW_LINE);
   SetIndexStyle(6, DRAW_LINE);
   SetIndexStyle(7, DRAW_LINE);
//----
   if (Sample <= 0) Sample = 20;
//----
   return(0);
}
//+------------------------------------------------------------------+
int deinit() {
//----
   
//----
   return(0);
}
//+------------------------------------------------------------------+
int start() {
//----
   double HOArray[], OLArray[];
   ArrayResize(HOArray, Sample);
   ArrayResize(OLArray, Sample);
//----
   int i,j;
   int counted_bars = IndicatorCounted();
   if(counted_bars < 0)  return(-1);
   if(counted_bars > 0)   counted_bars--;
   int limit = Bars - counted_bars;
   if(counted_bars==0) limit-=1+Sample+1;   
//----
   for (i=0; i<limit; i++) {
   
      for (j=0; j<Sample; j++) {
         HOArray[j] = High[i+j+1] - Open[i+j+1];
         OLArray[j] = Open[i+j+1] - Low[i+j+1];
      }
      ArraySort(HOArray);
      ArraySort(OLArray);
      
      int n1 = MathRound(Sample*Quartile_1/100);
      int n2 = MathRound(Sample*Quartile_2/100);
      int n3 = MathRound(Sample*Quartile_3/100);
      
      double q1 = OLArray[n1];
      double q2 = OLArray[n2];
      double q3 = OLArray[n3];
      double q4 = OLArray[Sample-1];
      double q5 = HOArray[n1];
      double q6 = HOArray[n2];
      double q7 = HOArray[n3];
      double q8 = HOArray[Sample-1];
      
      q1Buffer[i] = Open[i]-q1;
      q2Buffer[i] = Open[i]-q2;
      q3Buffer[i] = Open[i]-q3;
      q4Buffer[i] = Open[i]-q4;
      q5Buffer[i] = Open[i]+q5;
      q6Buffer[i] = Open[i]+q6;
      q7Buffer[i] = Open[i]+q7;
      q8Buffer[i] = Open[i]+q8;
   }
//----
   return(0);
}