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It has been on Bittrex for a while now... The wallet is offline and has been offline since MGO market started, at least 7 days now.

thanks my friend.
its wallet release for few minutes, so i call you.
now you are right

is bittrex better than poloniex ?

if you can verify your account legally, poloniex is one of the best exchanges.
but bittrex has much more coins to exchange.