The market order will be filled at the current best available price.
When placing a market order, you can either select [Amount], [Total] or [Percentage] to buy or sell. For example:
For example, if you want to buy or sell a certain amount of BTC, [Amount] will be suggested. However, if you just want to buy BTC with a certain amount of funds, such as 30,000 USDT, placing a market order with [Total] is a better option. If you want to buy BTC with 50% of your USDT tokens, then place an order with [Percentage].
In general, you can use these 3 functions to place your buy and sell orders. However, when you place the orders after the system calculates the amount you can get, the asset price might have changed significantly and the orders would fail. This often occurs when the buy/sell ratio is close to or equal to 100%.