BlueTrade Exchange notification:
INFO
[AMBER] Wallet maintenance. A 51% attack was successful at Ambercoin and transactions were erased.
Devs cover their tracks.
I can't acknowledge that, because I don't have an account at Bleutrade, but at C-cex and yobit everything looks fine (excluding price of course

)
I don't believe a 51 is/was happening... suffice to say BlueTrade has its own problems.
I have been moving my funds out for the past 2 weeks and would advise others to be wary of that exchange.