//+------------------------------------------------------------------+
//|                                     Moving Average Crossover.mq4 |
//|                                      Copyright © 2009, CompassFX |
//|                                         http://www.compassfx.com |
//+------------------------------------------------------------------+

#property copyright "Copyright © 2009, CompassFX"
#property link      "http://www.compassfx.com"

#property indicator_separate_window
#property indicator_buffers 4
#property indicator_color1 DodgerBlue
#property indicator_color2 Red
#property indicator_color3 DodgerBlue
#property indicator_color4 Red

double CrossUp[];
double CrossDown[];
double ExtMapBufferFast[];
double ExtMapBufferSlow[];

extern int Fast_MA_Period     = 5;
extern int Fast_MA_Method     = 1; //0=sma, 1=ema, 2=smma, 3=lwma
extern int Fast_MA_Price      = 0; 
extern int Slow_MA_Period     = 8;
extern int Slow_MA_Method     = 1; //0=sma, 1=ema, 2=smma, 3=lwma
extern int Slow_MA_Price      = 1; 
extern string MA_Method_Type  = "0=SMA, 1=EMA, 2=SMMA, 3=LWMA";
extern string MA_Price_Type   = "0=Close, 1=Open, 2=High, 3=Low";

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
  
//---- indicators
   IndicatorShortName("Moving Average Crossover | www.compassfx.com  ");
   
   SetIndexStyle(0, DRAW_ARROW, EMPTY);
   SetIndexArrow(0, 233);
   SetIndexBuffer(0, CrossUp);
   SetIndexStyle(1, DRAW_ARROW, EMPTY);
   SetIndexArrow(1, 234);
   SetIndexBuffer(1, CrossDown);

   SetIndexStyle(2,DRAW_LINE,STYLE_SOLID,1, DodgerBlue);
   SetIndexBuffer(2, ExtMapBufferFast);

   SetIndexStyle(3,DRAW_LINE,STYLE_SOLID,1, Red);
   SetIndexBuffer(3, ExtMapBufferSlow);

   
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//---- 

//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start() {
   int limit, i, counter;
   double Fast_MA_Periodnow, Slow_MA_Periodnow, Fast_MA_Periodprevious, Slow_MA_Periodprevious;
   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++) {
         
      Fast_MA_Periodnow = iMA(NULL, 0, Fast_MA_Period, 0, Fast_MA_Method, Fast_MA_Price, i);
      Fast_MA_Periodprevious = iMA(NULL, 0, Fast_MA_Period, 0, Fast_MA_Method, Fast_MA_Price, i+1);

      Slow_MA_Periodnow = iMA(NULL, 0, Slow_MA_Period, 0, Slow_MA_Method, Slow_MA_Price, i);
      Slow_MA_Periodprevious = iMA(NULL, 0, Slow_MA_Period, 0, Slow_MA_Method, Slow_MA_Price, i+1);
      
      if ((Fast_MA_Periodnow > Slow_MA_Periodnow) && (Fast_MA_Periodprevious < Slow_MA_Periodprevious)) 
      {
         CrossUp[i] = Fast_MA_Periodprevious - (High[i] - Low[i]) * 0.5;
      }
      else if ((Fast_MA_Periodnow < Slow_MA_Periodnow) && (Fast_MA_Periodprevious > Slow_MA_Periodprevious)) 
      {
         CrossDown[i] = Fast_MA_Periodprevious + (High[i] - Low[i]) * 0.5;
      }

      ExtMapBufferFast[i]=Fast_MA_Periodnow;
      ExtMapBufferSlow[i]=Slow_MA_Periodnow;

   }
  
   return(0);
}