Zen trade provides the players an option to trade ZEN for coins and visa versa.
There are 4 tabs.
Sales List: This is the list where you can buy ZEN, so you are paying coins and getting ZEN
Purchase List: This is the list where you can sell ZEN. so you are paying ZEN and getting coins.
The names of these 2 previous lists is a bit confusing, but always look at the button, that makes its clear.
Assign Trade: This is where you can sell your coins or zen. It is easy to make a mistake here as the term purchase and sales is not always clear. Just always look at the name of the first 2 tabs to see what you are selling.
My Orders: This is an overview of all your trades