there is negative sentiment about Coinlab but this is all before they even have started anything,
I don't know that it is a problem with Coinlab specifically versus a change where accounts that people had at Mt. Gox in Japan are being "transitioned" to some exchange operator operating from the U.S. That's a change many had not planned on occurring.
So does this cause people to buy at Mt. Gox and then sell on other exchanges to move their fiat out, prior to the upcoming event?
If that is what this rally was (e..g, traders with large balances having learned of this earlier) then that trading activity has already occurred and the volumes and prices will recede.
Or will the rest of the unwashed masses feel the need to do the same thing, spurring another buying spurt as people do the "transition" to another exchange all on their own.