because of the day traders.
after a good raly, expect the stock to go down a bit the next day because of the profit takers.
and since we have such a hot stock here. a transparent, fully reporting, PR'ing company. day traders would buy low, then sell at a point. they will do this untill the gap between the dip and the climb narrows then its going to shoot up! like a coiled spring.
rinse and repeat, imo, this is a health growth, very classic.
-riz