Вопрос по обработке сделок

 this.When(_order.Matched())
                            .Do(o =>
                                    {
                                        //алгоритм работы с ордером
                                    });

 public void RegisterOrder(JointRequest order)
        {
            order.State = StateJointRequest.Sended;
            JointRequests.Add(order);
            try
            {
                base.RegisterOrder(order.Order);
                OnJointRequestChanged(order);
                order.Save();
                this
                   .When(order.Order.Matched())
                   .Do((Action)(() => RequestMatched(order)));
                this
                  .When(order.Order.NewTrades())
                  .Do((Action<IEnumerable<MyTrade>>)((newTrades) => NewTradesRequest(order, newTrades)));
            }
            catch  
            {
                order.State = StateJointRequest.None;
            }
        }

        public void NewTradesRequest(JointRequest order,IEnumerable<MyTrade> MyTrades)
        {
            order.ClosePositions(MyTrades);
            //то самое условие
            if (order.Order.State == OrderStates.Done && (order.Order.Volume - order.Order.Balance == order.ClosedCount))
                order.CloseJR();
        }
  public void RequestMatched(JointRequest order)
        {
            //то самое условие
            if (order.Order.State == OrderStates.Done && (order.Order.Volume - order.Order.Balance == order.ClosedCount))
                order.CloseJR();
        }