I trade on ecxx. They are based in Singapore, are fully regulated, use ledger vault cold storage, and are backed by a 44 million dollar investment round.
Here is their ANN
https://bitcointalk.org/index.php?topic=5092500.0But do they really have any volume to complete the trades? because they were here for more than 8 months but still they didn't get into their 2nd page of ANN.