Need To Add Alert

//----------------------------------------------------------------------------------------
input string __________1__________="xxxxxxxxxxxxxxxxxxxxx";
input string __________2__________="=ARROW CODE=";//ARROW DETAILS
input string __________3__________="xxxxxxxxxxxxxxxxxxxxx";
input int ARROWUP =217;//ARROW CODE
input int ARROWDN =218;//ARROW CODE
input color ARROWUPc=clrWhite;//Arrow Up Color
input color ARROWDNc=clrWhite;//Arrow Dn Color
//----------------------------------------------------------------------------------------
//--- indicator buffers
double         ArrUpBuffer[];
double         ArrDnBuffer[];
//---
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   IndicatorBuffers(2);
   SetIndexBuffer(0,ArrUpBuffer);SetIndexStyle(0,DRAW_ARROW,STYLE_SOLID,2,ARROWUPc);SetIndexArrow(0,ARROWUP);
   SetIndexBuffer(1,ArrDnBuffer);SetIndexStyle(1,DRAW_ARROW,STYLE_SOLID,2,ARROWDNc);SetIndexArrow(1,ARROWDN);
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//---
   int i,limit;
   limit=rates_total-prev_calculated;
   if(prev_calculated>0)limit=limit+2;
   for(i=limit-2;i>=0;i--)
     {
      if(
         iMA(_Symbol,_Period,5,0,MODE_LWMA,PRICE_LOW,i+1)<iBands(_Symbol,_Period,20,2.0,0,PRICE_CLOSE,MODE_LOWER,i+1)
         )
        {ArrUpBuffer[i+1]=iBands(_Symbol,_Period,20,2.0,0,PRICE_CLOSE,MODE_LOWER,i+1)-35*pix_y();}
        
      if(
         iMA(_Symbol,_Period,5,0,MODE_LWMA,PRICE_HIGH,i+1)>iBands(_Symbol,_Period,20,2.0,0,PRICE_CLOSE,MODE_UPPER,i+1)
         )  
        {ArrDnBuffer[i+1]=iBands(_Symbol,_Period,20,2.0,0,PRICE_CLOSE,MODE_UPPER,i+1)+35*pix_y();}
     }
//---------------
   return(rates_total);
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
double pix_y()
  {
   return((ChartGetDouble(0,CHART_PRICE_MAX,0)-ChartGetDouble(0,CHART_PRICE_MIN,0))/ChartGetInteger(0,CHART_HEIGHT_IN_PIXELS,0));
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+

      if(
         iMA(_Symbol,_Period,5,0,MODE_LWMA,PRICE_LOW,i+1)<iBands(_Symbol,_Period,20,2.0,0,PRICE_CLOSE,MODE_LOWER,i+1)
         )
        {ArrUpBuffer[i+1]=iBands(_Symbol,_Period,20,2.0,0,PRICE_CLOSE,MODE_LOWER,i+1)-35*pix_y();}

      if(
         iMA(_Symbol,_Period,5,0,MODE_LWMA,PRICE_HIGH,i+1)>iBands(_Symbol,_Period,20,2.0,0,PRICE_CLOSE,MODE_UPPER,i+1)
         )  
        {ArrDnBuffer[i+1]=iBands(_Symbol,_Period,20,2.0,0,PRICE_CLOSE,MODE_UPPER,i+1)+35*pix_y();}