How does the order get executed?

At each price, there are multiple orders. During the entire runtime, priority was given to the first order placed.

Price fluctuation is based on order execution and it is not necessary for all orders at a price point to be executed before the market fluctuation.

An order can remain open when an investor places conditions on its transaction, such as a floor price. If the condition is not met (for example, the cryptocurrency price has not yet reached the minimum amount requested by the buyer), the order remains "open". Orders that can be seen on the open books are open orders and are in process 24/7 on BuyUCoin. They are executed when a buyer or seller approaches the specific price at which they buy or sell the order. If you want to buy or sell at the current price, you need to delete the placed buy/sell order. After deleting the pending buy/sell request, you can make a new buy or sell request.