Unfortunately most of the orders are not updated, and due to their unusual interface there isnt a chance that i see the actual trading history.
i think is working right now, they have fixed the orderbook and trading history
Is this safe? Just a different UI on top of EtherDelta Smart Contract? Or does it have its own Smart Contract??
it is the same contract and orderbook, IMHO is safe, but use an hardware wallet or metamask to be sure.
better safe than sorry