//+------------------------------------------------------------------+
//| Refreshes the symbol quotes data                                 |
//+------------------------------------------------------------------+
bool RefreshRates(void)
  {
//--- refresh rates
   if(!m_symbol.RefreshRates())
     {
      Print("RefreshRates error");
      return(false);
     }
//--- protection against the return value of "zero"
   if(m_symbol.Ask()==0 || m_symbol.Bid()==0)
      return(false);
//---
   return(true);
  }