Why are market orders so convenient? Because you don't have to set the price yourself; just fill in the quantity and you're done. But there's a key point: when two takers match with each other, there is no determined price; only when two makers meet do they bring their prices. Therefore, during the matching process, the actual operational logic is one taker paired with one maker—only then can both buyers and sellers lock in the same transaction price and quantity, allowing the trade to truly execute.