//+------------------------------------------------------------------+
//|                                         SMA-Crossover_Signal.mq4 |
//|         Copyright © 2005, Jason Robinson (jnrtrading)            |
//|                   http://www.jnrtading.co.uk                     |
//+------------------------------------------------------------------+
//+-------------------------------------------------------------------+
//| Allows you to enter two smoothed sma 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. (smas are initially set at 9 and 18)     |
//+-------------------------------------------------------------------+
#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 FasterSMMA=9;
extern int SlowerSMMA=18;
//+------------------------------------------------------------------+
//| 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 fasterSMMAnow,slowerSMMAnow,fasterSMMAprevious,slowerSMMAprevious,fasterSMMAafter,slowerSMMAafter;
   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;
      //----
      fasterSMMAnow=iMA(NULL,0,FasterSMMA,0,MODE_SMMA,PRICE_CLOSE,i);
      fasterSMMAprevious=iMA(NULL,0,FasterSMMA,0,MODE_SMMA,PRICE_CLOSE,i+1);
      fasterSMMAafter=iMA(NULL,0,FasterSMMA,0,MODE_SMMA,PRICE_CLOSE,i-1);
      //
      slowerSMMAnow=iMA(NULL,0,SlowerSMMA,0,MODE_SMMA,PRICE_CLOSE,i);
      slowerSMMAprevious=iMA(NULL,0,SlowerSMMA,0,MODE_SMMA,PRICE_CLOSE,i+1);
      slowerSMMAafter=iMA(NULL,0,SlowerSMMA,0,MODE_SMMA,PRICE_CLOSE,i-1);
      //
      if((fasterSMMAnow>slowerSMMAnow) && (fasterSMMAprevious<slowerSMMAprevious) && (fasterSMMAafter>slowerSMMAafter))
        {
         CrossUp[i]=Low[i]-Range*0.5;
        }
      else if((fasterSMMAnow<slowerSMMAnow) && (fasterSMMAprevious>slowerSMMAprevious) && (fasterSMMAafter<slowerSMMAafter))
        {
         CrossDown[i]=High[i]+Range*0.5;
        }
     }
//----     
   return(0);
  }
//+------------------------------------------------------------------+