TrendArea

//+------------------------------------------------------------------+
//|                                                        TrendArea |
//|                                                           mladen |
//+------------------------------------------------------------------+
#property copyright "copyleft mladen"
#property link      "mladenfx@gmail.com"

#property indicator_separate_window
#property indicator_buffers 3
#property indicator_color1 Green
#property indicator_color2 Red
#property indicator_color3 DimGray
#property indicator_width1 2
#property indicator_width2 2
#property indicator_style3 STYLE_DOT

//
//
//
//
//

extern int FastPeriod =  4;
extern int SlowPeriod = 15;
extern int MaMethod   = MODE_SMMA;

//
//
//
//
//

double gBuffer[];
double rBuffer[];
double zBuffer[];
double tBuffer[];
double aBuffer[];

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//
//
//
//
//

int init()
{
   IndicatorBuffers(5);
      SetIndexBuffer(0,gBuffer); SetIndexStyle(0,DRAW_HISTOGRAM);
      SetIndexBuffer(1,rBuffer); SetIndexStyle(1,DRAW_HISTOGRAM);
      SetIndexBuffer(2,zBuffer);
      SetIndexBuffer(3,tBuffer); SetIndexEmptyValue(3,0);
      SetIndexBuffer(4,aBuffer); SetIndexEmptyValue(4,0);
   
   //
   //
   //
   //
   //
         
   string ShortName;
   switch(MaMethod)
   {
      case 0 :  ShortName="TrendArea sma (";  break;
      case 1 :  ShortName="TrendArea ema (";  break;
      case 2 :  ShortName="TrendArea smma ("; break;
      case 3 :  ShortName="TrendArea lwma (";
   }
      
   IndicatorShortName(ShortName+FastPeriod+","+SlowPeriod+")");
   return(0);
}


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//
//
//
//
//

int start()
{
   int    countedBars = IndicatorCounted();
   int    i,limit;

   if (countedBars<0) return(-1);
   if (countedBars>0) countedBars--;
         limit = MathMin(Bars-countedBars,Bars-1);
   
   //
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   //
   //
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   for(i = limit; i >=0; i--)
   {
      double fastMa = iMA(NULL,0,FastPeriod,0,MaMethod,PRICE_CLOSE,i);
      double slowMa = iMA(NULL,0,SlowPeriod,0,MaMethod,PRICE_CLOSE,i);
      double fastMp = iMA(NULL,0,FastPeriod,0,MaMethod,PRICE_CLOSE,i+1);
      double slowMp = iMA(NULL,0,SlowPeriod,0,MaMethod,PRICE_CLOSE,i+1);
    
      //
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      //
        
      bool cross = ((fastMa>slowMa && fastMp<slowMp) || (fastMa<slowMa && fastMp>slowMp));
      if  (cross)
      {
         tBuffer[i] = 1;
         aBuffer[i] = 0;
      }         
      else
      {
         tBuffer[i] = tBuffer[i+1];
            if (fastMa > slowMa) tBuffer[i] = tBuffer[i+1]+1;
            if (fastMa < slowMa) tBuffer[i] = tBuffer[i+1]-1;
         aBuffer[i] = aBuffer[i+1] + MathAbs(tBuffer[i])*MathAbs(fastMa-slowMa);
      }
      
      //
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      //
      //
      //
    
      zBuffer[i] = 0;
      gBuffer[i] = EMPTY_VALUE;
      rBuffer[i] = EMPTY_VALUE;
         if (tBuffer[i]>0)
               gBuffer[i] =  aBuffer[i];
         else  rBuffer[i] = -aBuffer[i];
   }
   
   //
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   //
   //
   //
   
   return(0);
}