protected void UnRegisterSymbolTicksDelegates()
 {
     foreach (var tick in securities.Values)
     {
         OnDataReceived -= tick.OnDataReceived;
         _onAddComplete -= tick.CompleteAdding;
     }
 }
        protected SecurityTicksNoSkip AddSecurityTick(string symbol)
        {
            var tick = new SecurityTicksNoSkip(symbol);
            _onAddComplete += tick.CompleteAdding;
            OnDataReceived += tick.OnDataReceived;

            return tick;
        }