No. Some people do leveraged trading which is where (for example) you can borrow from the market to go short on an asset (borrow it to sell into a declining market then buy it back, return the borrowed coinage and pocket the difference).

Those are "pro" type features. I think they also have stop losses and all kinds of pro type stuff.

But you can also do just regular trading in "exchange" mode.

Another reason people use Bitfinex is that it has fiat markets for Bitcoin , Litecoin and Dash <--