I believe you meant you placed a limit order. This depends on the market conditions. If you want to sell your bitcoin into Ugx instantly, you can select market order (hence sell at the highest price available at the time) or fill an existing order on the order book.
Dear Joel , if you are not used to buying and transacting cryptocurrencies, you will find this beginner's guide helpful around all your questions. Please follow the link.https://support.binance.com/hc/en-us/sections/360002204471-Beginner-s-Guide