1. Sign in to BtcEX go to ''Market'' page.

2. Select crypto pair your want to buy/sell.

3. Select Buy/Sell crypto pair, if you are selling USDT it should press BUY USD, if you Buy USDT you should select SELL USD.

4. Enter Buy/Sell price & volume in Rate & Quantity column press ''PLACE ORDER'' button. 

5. After press ''PLACE ORDER'' you will see order putting in the order book & showing in ''MY ORDER'' column. You can delete and change price & volume by click the ''ACTION'' X button.