Go to your personal account, then to the section "trading" there on the left is a table with trading pairs. Select the desired trading pair and click on it (the buttons with currencies and trading pairs are clickable). Scroll down the page there on the left are the tables "BUY" and "SELL" and on the right are the glasses with the orders waiting to be executed. Select the necessary table for buying or selling, the available amount of coins for the transaction is indicated above the table (if you click on the amount, it automatically fits in the table in full amount), the price is automatically loaded from market, you can choose another price, part of the available volume for the transaction . Substitute the necessary data in the table, confirm your action by clicking the " BUY..." / " SELL..."