Taking advantage of arbitrage opportunities aren't always easy as it seems. To facilitate such trades, you have to ensure that you've a standard account on both platforms to be able to take those trades. Also, there's always a catch when an exchange offers crypto assets at a premium. It might look like a golden opportunity to take advantage of - rinse, repeat and accumulate profits but it's a lot more harder. Be sure to have all information available before making moves. I jumped on opportunities like that without adequate research and lost money instead of gaining.