//+------------------------------------------------------------------+
//|                                                  Market_Grid.mq4 |
//|                      Copyright © 2006, MetaQuotes Software Corp. |
//|                                        http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2006, Market Analytics & Automated Trading Ltd" 
#property link      "http://www.blackboxfutures.com"

#property indicator_chart_window
#property indicator_buffers 4
#property indicator_color1 Gainsboro

//---- input parameters
extern double    base=1.1266;
extern double    incr=0.0050;
extern bool      Debug = true;


int i;

double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
double ExtMapBuffer4[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         | 
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   IndicatorBuffers(4);
   
   SetIndexStyle(0,DRAW_LINE, STYLE_DOT,1,indicator_color1);
   SetIndexBuffer(0, ExtMapBuffer1); 
   SetIndexStyle(1,DRAW_LINE, STYLE_DOT,1,indicator_color1);
   SetIndexBuffer(1, ExtMapBuffer2);
   SetIndexStyle(2,DRAW_LINE, STYLE_DOT,1,indicator_color1);
   SetIndexBuffer(2, ExtMapBuffer3);
   SetIndexStyle(3,DRAW_LINE, STYLE_DOT,1,indicator_color1); 
   SetIndexBuffer(3, ExtMapBuffer4);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       | 
//+------------------------------------------------------------------+
int deinit()
  {
//----
   
//----
   return(0);
  }
//+------------------------------------------------------------------+ 
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   double _level0=0.0;
   double _level1=0.0 ;
   double _level2=0.0;
   double _level3=0.0;
   
   int    counted_bars=IndicatorCounted();
//----
      i=Bars-counted_bars-1;
      while(i>=0)
      {
         _level0 = URLevel(base, incr, i); 
         _level1 = _level0+incr;
         _level2 = _level0+(incr*2);
         _level3 = _level0-incr;
         if(Debug)
         {
            Print("_level0   :"  + _level0);
            Print("_level1   :"  + _level1); 
            Print("_level2   :"  + _level2);
            Print("_level3   :"  + _level3);
            Print("incr     : " + incr);
         }
         ExtMapBuffer1[i]= _level0; 
         ExtMapBuffer2[i]= _level1;
         ExtMapBuffer3[i]= _level2;
         ExtMapBuffer4[i]= _level3; 
         i--;
      }   
//----
   return(0);
  }
//+------------------------------------------------------------------+ 
double URLevel(double base, double incr, int idx)
{
   double offset = 0;
   double _urlevel = 0;
   
   offset = base - (MathFloor(base/incr) * incr);
   _urlevel = (MathFloor(Close[idx]/incr) * incr) + offset; 
   
   if(Debug)
   {
      Print("MathFloor(base/incr))   : " + MathFloor(base/incr));
      Print("Offset       : " + offset); 
      Print("URLevel   : " + _urlevel);
   }
   
   return(_urlevel);
  

}