-Firstly, you need to create an account on OKX.
-Secondly, there are two ways to buy Terra Luna: 1) If you want to use fiat to purchase Luna directly, you can go to 'Buy crypto
' page, select the fait you wanted to pay with and choose Luna crypto, enter the volume you want to buy, then click 'Buy'. 2) If you already hold some cryptos, such as BTC or USDT, you can go to 'Trade
', and find Luna crypto in the search box, choose your preferred trading pair. Then, enter the price and amount of Luna crypto you wanted, and wait for the fulfilment of the order.