//+------------------------------------------------------------------+
//|                                                   machXalert.mq4 |
//|                      Copyright © 2007, MetaQuotes Software Corp. |
//|                                        http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2007, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net"
//----
#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Yellow
#property indicator_color2 Red
//----
#property indicator_width1 2
#property indicator_width2 2
//----
double CrossUp[];
double CrossDown[];
//----
extern int FasterSMA       =12;
extern int FASTER_SMA_SHIFT=3;
extern int SlowerSMA       =25;
extern int SLOWER_SMA_SHIFT=5;
extern bool Alerts=true;
//----
int upalert=true,downalert=true;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   SetIndexStyle(0, DRAW_ARROW, EMPTY);
   SetIndexArrow(0, 74);
   SetIndexBuffer(0, CrossUp);
   SetIndexStyle(1, DRAW_ARROW, EMPTY);
   SetIndexArrow(1, 74);
   SetIndexBuffer(1, CrossDown);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//---- 
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
  int start() 
  {
   int limit, i, counter;
   double fasterSMAnow, slowerSMAnow, fasterSMAprevious, slowerSMAprevious, fasterSMAafter, slowerSMAafter;
   double Range, AvgRange;
   int counted_bars=IndicatorCounted();
//---- check for possible errors
   if(counted_bars<0) return(-1);
//---- last counted bar will be recounted
   if(counted_bars>0) counted_bars--;
//----
   limit=Bars-counted_bars;
     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;
//----
      fasterSMAnow=iMA(NULL, 0, FasterSMA, FASTER_SMA_SHIFT, MODE_SMA, PRICE_CLOSE, i);
      fasterSMAprevious=iMA(NULL, 0, FasterSMA, FASTER_SMA_SHIFT, MODE_SMA, PRICE_CLOSE, i+1);
      fasterSMAafter=iMA(NULL, 0, FasterSMA, FASTER_SMA_SHIFT, MODE_SMA, PRICE_CLOSE, i-1);
      slowerSMAnow=iMA(NULL, 0, SlowerSMA, SLOWER_SMA_SHIFT, MODE_SMA, PRICE_CLOSE, i);
      slowerSMAprevious=iMA(NULL, 0, SlowerSMA, SLOWER_SMA_SHIFT, MODE_SMA, PRICE_CLOSE, i+1);
      slowerSMAafter=iMA(NULL, 0, SlowerSMA, SLOWER_SMA_SHIFT, MODE_SMA, PRICE_CLOSE, i-1);
//----
        if ((fasterSMAnow > slowerSMAnow) && (fasterSMAprevious < slowerSMAprevious) && (fasterSMAafter > slowerSMAafter)) 
        {
         CrossUp[i]=Low[i] - Range*0.5;
         if(i<=2 && Alerts && !upalert)
           {
            Alert (Symbol()," ",Period(),"M  SMACross UP ");
            //SendMail("SMA Cross Up on "+Symbol(),"");
            upalert=true;
            downalert=false;
           }
        }
        else if ((fasterSMAnow < slowerSMAnow) && (fasterSMAprevious > slowerSMAprevious) && (fasterSMAafter < slowerSMAafter)) 
        {
            CrossDown[i]=High[i] + Range*0.5;
            if(i<=2 && Alerts && !downalert)
              {
               Alert (Symbol()," ",Period(),"M  SMACross DOWN ");
               //SendMail("SMA Cross Down on "+Symbol(),"");
               downalert=true;
               upalert=false;
              }
           }
     }
   //----
   return(0);
  }
//+------------------------------------------------------------------+