Quick Trade section is a place where you can quickly and efficiently sell or buy your assets on demand. It is easy to use and to navigate.  

From your Dashboard menu click on Quick Trade button:

Then choose Quick Trade:

 Choose the desired trading pair from the menu:

Note that the first trading pair is BTC/EUR. 

After you've chosen the trading pair, you can now opt into Buying or Selling the asset that is listed first in the trading pair. Write down the amount you want to trade.

Click on "Buy/Sell" to finish the transaction.