If you buy/sell crypto asset through the limit buy/sell method, then there is a possibility that your order will go into a pending order. A pending order is an order that has been entered into the market by a member but there has not been a transaction (match), because the price entered has not met the last market price.
If you want to sell/buy crypto asset quickly, you can use the market (instant) sell/buy method. Please cancel the pending order that has been created, and make an instant buy/sell.