Unlike traditional exchanges, Crypto exchanges don’t have set trading hours. They are open 24 hours a day, 7 days a week. To place a ‘buy’ order on the exchange, you have to fund your exchange account, also known as a wallet first with regular fiat currency or another Cryptocurrency. The ‘buy’ and ‘sell’ orders are added to the ‘order book’, which lists the amounts of Cryptocurrency that traders want to ‘buy’ and ‘sell’, and the prices they are looking for. Essentially, the exchange acts as a matchmaking service between the buyers and sellers.