problem with mql4 indicator and with sendnotification

[valfid]

how come this indicator of mine has always sent me the notifications at the right time and now does not send a notification anymore? There is an error in the code or I have some blocking on the notifications according to you 

#property indicator_chart_window

datetime timeBar;
bool isNewBar;

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[])
  {
   if(Time[0]!=timeBar) isNewBar=true;
   else isNewBar=false;

   double mc1=iMACD(NULL,0,12,26,9,PRICE_CLOSE,MODE_MAIN,1);
   double mc2=iMACD(NULL,0,12,26,9,PRICE_CLOSE,MODE_SIGNAL,1); 
   double mc01=iMACD(NULL,0,12,26,9,PRICE_CLOSE,MODE_MAIN,0); 
   double mc02=iMACD(NULL,0,12,26,9,PRICE_CLOSE,MODE_SIGNAL,0); 

   if(isNewBar)
     {
      if(mc1<mc2&&mc01>mc02) SendNotification(Symbol()+" TF:"+IntegerToString(Period())+" "+" buy: ");
      if(mc1>mc2&&mc01<mc02) SendNotification(Symbol()+" TF:"+IntegerToString(Period())+" "+"short: ");
      timeBar = Time[0];
     }

   return(rates_total);
  }

//+------------------------------------------------------------------+