That looks like a break-out from the leading diagonal wedge that seemed to be forming from the $340 bottom.

Strong volume, although it still needs to confirm itself.

I have bought in at $600, but am ready to bail back out should the break out fail and simply result in the final high of the leg up from $460 as posters such as ibankbitcoins suggests.

Important to note before the denialists start trying to deny it, is that Huobi was once again, ahead of Bitstamp on this break out (2 mins ahead). We are still being lead from China.