Событие наличия активных заявок

        private ObservableCollection<Order> myorders = new ObservableCollection<Order>();
            mygrid.ItemsSource = myorders;
            _trader.OrdersChanged += orders => this.GuiAsync(() =>
            {
                //myorders.Clear();
                foreach (Order order in orders)
                {
                    if (order.State == OrderStates.Active)
                    {
                        myorders.Add(order);
                    }
                }
            }); 

_trader.SupportManualOrders = true;

            var contract = Decimal.Parse(todo.Text);
            var order = new Order
            {
                Trader = _trader,
                Portfolio = (Portfolio)Accounts.SelectedItem,
                Security = (Security)Securitites.SelectedItem,
                Volume = contract,
                Price = decimal.Parse(_price.Text),
                Direction = OrderDirections.Buy
            };

            var best = new BestByVolumeQuotingStrategy(order, 100);
            best.OpenPositionByQuoting(contract);
            best.RegisterOrder(order);