//+------------------------------------------------------------------+
//|                                                    MA_BBands.mq4 |
//|                   Copyright 2005-2014, MetaQuotes Software Corp. |
//|                                              http://www.mql4.com |
//|                                        E-MAIL:40468962@qq.com    |
//+------------------------------------------------------------------+
#property copyright   "2005-2014, MetaQuotes Software Corp."
#property link        "http://www.mql4.com"

#property indicator_chart_window
#property indicator_buffers 5
#property indicator_color1 White
#property indicator_color2 White
#property indicator_color3 Blue
#property indicator_color4 OrangeRed
#property indicator_color5 Yellow

#property  indicator_width1  2
#property  indicator_width2  2
#property  indicator_width3  1
#property  indicator_width4  1
#property  indicator_width5  1



extern int MACDFastPeriod = 5;
extern int MACDLowPeriod = 9;
extern int MACDsignal = 3 ; 
extern int MAPeriod = 9 ;
extern int MoveShift = 0;
extern int MAFastPeriod = 4;
extern int Dist2 = 20 ;
//-------------------------

extern double Std = 0.4 ; //0.5
extern int BPeriod = 20 ;


//-------------------------

double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
double ExtMapBuffer4[];
double ExtMapBuffer5[];
//-------------------

int init()
  {
  
   IndicatorBuffers(5);
  
   SetIndexStyle(0,DRAW_LINE);
   SetIndexBuffer(0,ExtMapBuffer1);
   
   SetIndexStyle(1,DRAW_LINE);
   SetIndexBuffer(1,ExtMapBuffer2);
   
   SetIndexStyle(2,DRAW_ARROW);
   SetIndexArrow(2,233);
   SetIndexBuffer(2,ExtMapBuffer3);
   SetIndexEmptyValue(2,0.0);
   
   SetIndexStyle(3,DRAW_ARROW);
   SetIndexArrow(3,234);
   SetIndexBuffer(3,ExtMapBuffer4);
   SetIndexEmptyValue(3,0.0);
   
   SetIndexStyle(4,DRAW_LINE);
   SetIndexBuffer(4,ExtMapBuffer5);   

   
   return(0);
  }
//----------------------------------------
 
int deinit()
  {return(0);}
//---------------------------------------- 
int start()
  { 
  Comment( " MA_BBands " );  
    int counted_bars=IndicatorCounted();    
    if(counted_bars<0) return(-1); 
    if(counted_bars>0) counted_bars--;
    int limit = Bars-counted_bars;   
    double OsMA_Now, OsMA_Pre;
    int i;
    
    double MAUP1;
    double BB_UP;
    double MA_HIGH;
    double MADN1;
    double BB_DN;
    double MA_LOW;
  
    
    for( i=0;i < limit ; i++)    
     {           
           MAUP1 = iMA(Symbol(),Period(),MAPeriod,0,MODE_SMA,PRICE_HIGH,i); 
           BB_UP = iBands(Symbol(),Period(),BPeriod,Std,0,PRICE_HIGH,MODE_UPPER,i);
           MA_HIGH = iMA(Symbol(),Period(),MAFastPeriod,0,MODE_LWMA,PRICE_HIGH,i);  
           
           MADN1 = iMA(Symbol(),Period(),MAPeriod,0,MODE_SMA,PRICE_LOW,i); 
           BB_DN = iBands(Symbol(),Period(),BPeriod,Std,0,PRICE_LOW ,MODE_LOWER,i);
           MA_LOW = iMA(Symbol(),Period(),MAFastPeriod,0,MODE_LWMA,PRICE_LOW,i);  
        
       
          if (MAUP1>BB_UP) {ExtMapBuffer1[i + MoveShift]=MAUP1+Dist2*Point; BB_UP=EMPTY_VALUE ;}     
          else if (MAUP1<BB_UP) {ExtMapBuffer1[i + MoveShift]=BB_UP ; MAUP1=EMPTY_VALUE ;}
//--------------------------------------------------------------------             
           
                      
            
   //      if( MADN1 >0.0 ) 
   //      {
          if ( MADN1<BB_DN)  {ExtMapBuffer2[i + MoveShift]=MADN1-Dist2*Point; BB_DN=EMPTY_VALUE ;}                        
          else if (MADN1>BB_DN) { ExtMapBuffer2[i + MoveShift]=BB_DN ; MADN1=EMPTY_VALUE ; }
   //      }
       
 //        if (MADN1 ==0.0 ) { ExtMapBuffer2[i]=BB_DN; MADN1=EMPTY_VALUE ;}          
//------------------------------------------------------------       
       OsMA_Now = iOsMA(Symbol(),Period(),MACDFastPeriod,MACDLowPeriod,MACDsignal,PRICE_CLOSE,i) ;
       OsMA_Pre = iOsMA(Symbol(),Period(),MACDFastPeriod,MACDLowPeriod,MACDsignal,PRICE_CLOSE,i+1) ;

//-------------------
        if((OsMA_Pre<0 && OsMA_Now>0  )&&(MA_LOW < ExtMapBuffer2[i]) && (Low[i] < ExtMapBuffer2[i]) ) 
       {
        ExtMapBuffer3[i+1] = Low[i]-30*Point;
       }
              
       if((OsMA_Now<0 && OsMA_Pre>0) && (MA_HIGH > ExtMapBuffer1[i]) && (High[i] > ExtMapBuffer1[i]) ) 
       {
        ExtMapBuffer4[i+1] = High[i]+30*Point;
       }  
       
       
      ExtMapBuffer5[i+ MoveShift] = (ExtMapBuffer1[i + MoveShift] +ExtMapBuffer2[i + MoveShift])/2.0 ;
   
         
     } 
     
   return(0);
   RefreshRates(); 
   
  } 
//--------------------------------