Не работают правила BestAskPriceMore и BestAskPriceLess

Trader.Connected += () => this.GuiAsync(() => ExportDde.IsEnabled = true);

Trader.SecuritiesChanged += (Trader_SecuritiesChanged); // мой код

ShowSecurities.IsEnabled = ShowTrades.IsEnabled = 
...

private void Trader_SecuritiesChanged(IEnumerable<Security> securitys)
        {
            foreach(Security p in securitys) {
                if(p == null) {
                    System.Diagnostics.Debug.WriteLine("p == null");
                }
                if(p.BestAsk == null) {
                    System.Diagnostics.Debug.WriteLine("p.BestAsk == null");
                }
                if(p.BestBid == null) {
                    System.Diagnostics.Debug.WriteLine("p.BestBid == null");
                }
                //System.Diagnostics.Debug.WriteLine("securitys " + p.BestAsk.Price.ToString() + " " + p.BestBid.Price.ToString());
            }
        }

	class SmaStrategy : Strategy
	{
		public SmaStrategy(CandleManager candleManager, SimpleMovingAverage longSma, SimpleMovingAverage shortSma, TimeSpan timeFrame)
		{
			LongSma = longSma;
			ShortSma = shortSma;
		}

		public SimpleMovingAverage LongSma { get; private set; }
		public SimpleMovingAverage ShortSma { get; private set; }

		protected override void OnStarting()
		{
			this.When(Security.BestBidPriceMore(0.0001)).Do(OnProcess);
			this.When(Security.BestBidPriceMore(new Unit(1800, UnitTypes.Limit))).Do(OnProcess2);

			base.OnStarting();
		}

		protected void OnProcess()
		{
			System.Diagnostics.Debug.WriteLine("Rule succeeded");
		}

		protected void OnProcess2()
		{
			System.Diagnostics.Debug.WriteLine("Rule2 succeeded");
		}
	}