Accelerator Alert

//+------------------------------------------------------------------+
//|                                             AcceleratorAlert.mq4 |
//|                      Copyright © 2005, MetaQuotes Software Corp. |
//|                                       http://www.metaquotes.net/ |
//|                                     Alerts & Arrows added by cja |
//|  Thanks to mladen for the Arrow code & IgorAD for the Alert code |
//+------------------------------------------------------------------+
#property  copyright "Copyright © 2005, MetaQuotes Software Corp."
#property  link      "http://www.metaquotes.net/"
//---- indicator settings
#property  indicator_separate_window
#property  indicator_buffers 3
#property  indicator_color1  Black
#property  indicator_color2  Green
#property  indicator_color3  Red
#property  indicator_width2  2
#property  indicator_width3  2


extern bool   PopUP_Alert_ON  = false;
extern bool   SoundAlert_ON   = false;
extern string SoundFile       ="alert2.wav";
extern bool   Show_Arrows     = true;
extern int    Arrow_Size      = 1;
extern int    ArrowUP         = 233;//241
extern int    ArrowDN         = 234;//242
extern int    Arrow_Shift     = 4;

//---- indicator buffers
double     ExtBuffer0[];
double     ExtBuffer1[];
double     ExtBuffer2[];
double     ExtBuffer3[];
double     ExtBuffer4[];

bool       UpTrend=false, DownTrend=false;

int      maxArrows;

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- 2 additional buffers are used for counting.
   IndicatorBuffers(5);
//---- drawing settings
   SetIndexStyle(0,DRAW_NONE);
   SetIndexStyle(1,DRAW_HISTOGRAM);
   SetIndexStyle(2,DRAW_HISTOGRAM);
   IndicatorDigits(Digits+2);
   SetIndexDrawBegin(0,38);
   SetIndexDrawBegin(1,38);
   SetIndexDrawBegin(2,38);
//---- 4 indicator buffers mapping
   SetIndexBuffer(0,ExtBuffer0);
   SetIndexBuffer(1,ExtBuffer1);
   SetIndexBuffer(2,ExtBuffer2);
   SetIndexBuffer(3,ExtBuffer3);
   SetIndexBuffer(4,ExtBuffer4);
//---- name for DataWindow and indicator subwindow label
   IndicatorShortName("AC");
   SetIndexLabel(1,NULL);
   SetIndexLabel(2,NULL);
//---- initialization done
   return(0);
  }
  
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//----
     //ObjectsDeleteAll(0,OBJ_ARROW);
    // ObjectDelete("ACC_BUY");
    // ObjectDelete("ACC-SELL");
       DeleteArrows();
     
//----
   return(0);
  }  
//+------------------------------------------------------------------+
//| Accelerator/Decelerator Oscillator                               |
//+------------------------------------------------------------------+
int start()
  {
   int    limit;
   int    counted_bars=IndicatorCounted();
   double prev,current;
   //---- last counted bar will be recounted
   if(counted_bars>0) counted_bars--;
   limit=Bars-counted_bars;
   //---- macd counted in the 1-st additional buffer
   for(int i=0; i<limit; i++)
      ExtBuffer3[i]=iMA(NULL,0,5,0,MODE_SMA,PRICE_MEDIAN,i)-iMA(NULL,0,34,0,MODE_SMA,PRICE_MEDIAN,i);
   //---- signal line counted in the 2-nd additional buffer
   for(i=0; i<limit; i++)
      ExtBuffer4[i]=iMAOnArray(ExtBuffer3,Bars,5,0,MODE_SMA,i);
   //---- dispatch values between 2 buffers
   bool up=true;
   for(i=limit-1; i>=0; i--)
     {
      current=ExtBuffer3[i]-ExtBuffer4[i];
      prev=ExtBuffer3[i+1]-ExtBuffer4[i+1];
      if(current>prev) up=true;
      if(current<prev) up=false;
      if(!up)
        {
         ExtBuffer2[i]=current;
         ExtBuffer1[i]=0.0;
        }
      else
        {
         ExtBuffer1[i]=current;
         ExtBuffer2[i]=0.0;
        }
       ExtBuffer0[i]=current;
     }
         
   if (Show_Arrows)
      for (i=0; i<WindowBarsPerChart() ;i++)//Bars for showing total history of signals
         {
            if( ExtBuffer3[i]-ExtBuffer4[i]<ExtBuffer3[i+1]-ExtBuffer4[i+1] 
            && ExtBuffer3[i+1]-ExtBuffer4[i+1]>ExtBuffer3[i+2]-ExtBuffer4[i+2] 
            && Volume[0]>1 && !UpTrend) DrawArrow(i,"up");
            
            if ( ExtBuffer3[i]-ExtBuffer4[i]>ExtBuffer3[i+1]-ExtBuffer4[i+1] 
            && ExtBuffer3[i+1]-ExtBuffer4[i+1]<ExtBuffer3[i+2]-ExtBuffer4[i+2]
            && Volume[0]>1 && !DownTrend)  DrawArrow(i,"down");
         }

    
   if ( current>prev && Volume[0]>1 && !UpTrend)
	{
	if ( PopUP_Alert_ON==true ) Alert(""+Symbol()+" M"+Period()+": ACC Signal for BUY &  "+DoubleToStr(Bid,Digits)+"");
	if(SoundAlert_ON==true)PlaySound(SoundFile); 
	UpTrend=true; DownTrend=false;
	} 
	 	  
	if ( current<prev && Volume[0]>1 && !DownTrend)
	{
	if ( PopUP_Alert_ON==true ) Alert(""+Symbol()+" M"+Period()+": ACC Signal for SELL &  "+DoubleToStr(Bid,Digits)+""); 
	if(SoundAlert_ON==true)PlaySound(SoundFile);
	DownTrend=true; UpTrend=false;
	} 

   //---- done
   return(0);
  }
  
  
void DrawArrow(int i,string type)//Arrow_Size
{
   maxArrows++;
      ObjectCreate("AC_ArrowALERT"+maxArrows,OBJ_ARROW,0,Time[i],0);
      if (type=="up")
         {
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_PRICE1,High[i]+((4+Arrow_Shift)*Point));
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_ARROWCODE,ArrowDN);
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_WIDTH,Arrow_Size);
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_COLOR,Red);
         }
      else
         {
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_PRICE1,Low[i]-((2+Arrow_Shift)*Point));
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_ARROWCODE,ArrowUP);
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_WIDTH,Arrow_Size);
            ObjectSet("AC_ArrowALERT"+maxArrows,OBJPROP_COLOR,LimeGreen);
         }
}
void DeleteArrows()
{
   while(maxArrows>0) { ObjectDelete("AC_ArrowALERT"+maxArrows); maxArrows--; }
}