Exemplo n.º 1
0
        public Trade[] Execute(Order order)
        {
            if (order.Quantity > 0)
            {
                BuyOrders.Enqueue(order);
            }
            else
            {
                SellOrders.Enqueue(order);
            }

            var trades = new List <Trade>();

            while (BuyOrders.Count > 0 && SellOrders.Count > 0)
            {
                var buy  = BuyOrders.Peek();
                var sell = SellOrders.Peek();

                if (buy.Price < sell.Price)
                {
                    break;
                }

                var quantity = Math.Min((buy.RemainingQuantity), sell.RemainingQuantity);
                var price    = buy.Generation < sell.Generation ? buy.Price : sell.Price;

                var trade = new Trade(buy.Participant, sell.Participant, buy.Instrument, quantity, price);

                trades.Add(trade);

                buy.Fill(quantity);
                sell.Fill(quantity);

                if (buy.RemainingQuantity == 0)
                {
                    BuyOrders.Dequeue();
                }

                if (sell.RemainingQuantity == 0)
                {
                    SellOrders.Dequeue();
                }
            }

            return(trades.ToArray());
        }