//+------------------------------------------------------------------+
//|                                         EMA-Crossover_Signal.mq4 |
//|         Copyright © 2005, Jason Robinson (jnrtrading)            |
//|                   http://www.jnrtading.co.uk                     |
//+------------------------------------------------------------------+
/*
  +------------------------------------------------------------------+
  | Allows you to enter two ema periods and it will then show you at |
  | Which point they crossed over. It is more usful on the shorter   |
  | periods that get obscured by the bars / candlesticks and when    |
  | the zoom level is out. Also allows you then to remove the emas   |
  | from the chart. (emas are initially set at 5 and 6)              |
  +------------------------------------------------------------------+
*/
#property copyright "Copyright © 2005, Jason Robinson (jnrtrading)"
#property link      "http://www.jnrtrading.co.uk"
//----
#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 SpringGreen
#property indicator_color2 Red
//----
double CrossUp[];
double CrossDown[];
extern int FasterEMA=5;
extern int SlowerEMA=6;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   SetIndexStyle(0,DRAW_ARROW,EMPTY);
   SetIndexArrow(0,233);
   SetIndexBuffer(0,CrossUp);
   SetIndexStyle(1,DRAW_ARROW,EMPTY);
   SetIndexArrow(1,234);
   SetIndexBuffer(1,CrossDown);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//---- 
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   int limit,i,counter;
   double fasterEMAnow,slowerEMAnow,fasterEMAprevious,slowerEMAprevious,fasterEMAafter,slowerEMAafter;
   double Range,AvgRange;

   int counted_bars=IndicatorCounted();
   if(counted_bars<0) return(-1);
   if(counted_bars>0) counted_bars--;
   limit=Bars-counted_bars;
   if(counted_bars==0) limit-=1+9;
//----
   for(i=0; i<=limit; i++)
     {
      counter=i;
      Range=0;
      AvgRange=0;
      for(counter=i;counter<=i+9;counter++)
        {
         AvgRange=AvgRange+MathAbs(High[counter]-Low[counter]);
        }
      Range=AvgRange/10;
      //----
      fasterEMAnow=iMA(NULL,0,FasterEMA,0,MODE_LWMA,PRICE_CLOSE,i);
      fasterEMAprevious=iMA(NULL,0,FasterEMA,0,MODE_LWMA,PRICE_CLOSE,i+1);
      fasterEMAafter=iMA(NULL,0,FasterEMA,0,MODE_LWMA,PRICE_CLOSE,i-1);
      //----
      slowerEMAnow=iMA(NULL,0,SlowerEMA,0,MODE_LWMA,PRICE_CLOSE,i);
      slowerEMAprevious=iMA(NULL,0,SlowerEMA,0,MODE_LWMA,PRICE_CLOSE,i+1);
      slowerEMAafter=iMA(NULL,0,SlowerEMA,0,MODE_LWMA,PRICE_CLOSE,i-1);
      //----
      if((fasterEMAnow>slowerEMAnow) && (fasterEMAprevious<slowerEMAprevious) && (fasterEMAafter>slowerEMAafter))
        {
         CrossUp[i]=Low[i]-Range*0.5;
        }
      else if((fasterEMAnow<slowerEMAnow) && (fasterEMAprevious>slowerEMAprevious) && (fasterEMAafter<slowerEMAafter))
        {
         CrossDown[i]=High[i]+Range*0.5;
        }
     }
   return(0);
  }
//+------------------------------------------------------------------+