//+------------------------------------------------------------------+
//|                                                    NRTR WATR.mq4 |
//|                                        Ramdass - Conversion only |
//+------------------------------------------------------------------+

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Blue
#property indicator_color2 Red
//---- input parameters
extern int AveragePeriod = 10;
extern int Variant = 2;
extern int CountBars = 300;
//---- buffers
double value1[];
double value2[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicator line
   IndicatorBuffers(2);
   SetIndexStyle(0, DRAW_ARROW);
   SetIndexArrow(0, 167);
   SetIndexStyle(1, DRAW_ARROW);
   SetIndexArrow(1, 167);
   SetIndexBuffer(0, value1);
   SetIndexBuffer(1, value2);
//----
   if(CountBars >= Bars) 
       CountBars = Bars - AveragePeriod - 2;
   SetIndexDrawBegin(0, Bars - CountBars + 1);
   SetIndexDrawBegin(1, Bars - CountBars + 1);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| NRTR WATR                                                        |
//+------------------------------------------------------------------+
int start()
  {
   int i, i2, bar, counted_bars = IndicatorCounted();
   double value, WATR;
   double trend = 1, dK, AvgRange, price, AveragePeriod_D;
   AveragePeriod_D = AveragePeriod;
//----
   if(Bars <= AveragePeriod) 
       return(0);
//---- initial zero
   if(counted_bars < 1)
     {
       for(i = 1; i <= AveragePeriod; i++) 
           value1[Bars-i] = 0.0;
       for(i = 1; i <= AveragePeriod; i++) 
           value2[Bars-i] = 0.0;
     }
   AvgRange = 0;
   if((Variant == 2) || (Variant == 3))
     {
       for(i=AveragePeriod; i>=1; i--)
         {
           dK = 1 + (AveragePeriod_D - i) / AveragePeriod_D;
           AvgRange = AvgRange + dK*MathAbs(High[i] - Low[i]);
         }
       if(Symbol() == "USDJPY" || Symbol() == "GBPJPY" || Symbol() == "EURJPY")
         {
           WATR = AvgRange / AveragePeriod_D / 100;
         }
       else    
         {
           WATR = AvgRange / AveragePeriod_D;
         }
     }
   if(Variant == 1)  
     {
       for(i = 1; i <= AveragePeriod; i++)
         {
           dK = 1 + (AveragePeriod_D - i) / AveragePeriod_D;
           AvgRange = AvgRange + dK*MathAbs(High[CountBars + i] - Low[CountBars + i]);
          }
       WATR = AvgRange/AveragePeriod_D;
     }
   if(Close[CountBars-1] > Open[CountBars-1])
     {
       value1[CountBars - 1] = Close[CountBars - 1] * (1 - WATR);
       trend = 1; 
       value2[CountBars - 1] = 0.0;
     }
   if(Close[CountBars-1] < Open[CountBars-1])
     {
       value2[CountBars - 1] = Close[CountBars - 1] * (1 + WATR);
       trend = -1; value1[CountBars - 1] = 0.0;
     }
   bar = CountBars;
   while(bar >= 0)
     {
       value1[bar] = 0.0; 
       value2[bar] = 0.0;
       if(Variant == 3)
         {
           AvgRange = 0;
           for(i = 1; i <= AveragePeriod; i++)
             {
               dK = 1 + (AveragePeriod_D-i) / AveragePeriod_D;
               AvgRange = AvgRange + dK*MathAbs(High[bar + i] - Low[bar + i]);
             }
           WATR = AvgRange / AveragePeriod_D;
         }
       if(trend == 1)
         {
           if(Close[bar] > price) price = Close[bar];
           value = price * (1 - WATR);
           if(Close[bar] < value) 
             {
               price = Close[bar];
               value = price * (1 + WATR);
               trend = -1;
             }
         }
       if(trend == -1) 
         {
           if(Close[bar] < price) 
               price = Close[bar];
           value = price * (1 + WATR);
           if(Close[bar] > value)
             {
               price = Close[bar];
               value = price * (1 - WATR);
               trend = 1;
             }
         }
       if(trend == 1)  
         {
           value1[bar] = value; 
           value2[bar] = 0.0;
         }
       if(trend == -1)  
         {
           value2[bar] = value; 
           value1[bar] = 0.0;
         }
       bar--;
     }
   return(0);
  }
//+------------------------------------------------------------------+