https://coinex.pw/ suggests the site is down for maintenance and they have activated the cloudflare 'I am under attack' filter.

Twitter post says:

CoinEX.pw ‏@CoinexPW Mar 16

Security issue, investigating


http://ilikekillnerds.com/2014/03/looks-like-coinex-pw-might-have-been-hacked/ this contains a fair bit of information.