There are many different situations that may cause a trade not to execute at the exact price, or the precise time we want. Some situations that influence your order execution may be the volume of Internet traffic at the very moment you are making a buying or selling order, the volume of orders for the security that may be taking place simultaneously, and limits to the technology of the individual trading platform the firm is using. Even when you are given notice that an order was received by your broker, it does not necessarily mean your order was executed. It may just be an order confirmation, so please check with your brokerage firm about its notification procedures.