Look in the lower panel, the daily volume.

http://bigcharts.marketwatch.com/quickchart/q...amp;time=6

See how it flatlined at a low level when the stock was pretty much doing nothing in end of March/April/beginning of May, and see how it zoomed on the break out in May -- and has been above the April levels most days since then? See how the volume yesterday and today was pretty good, especially by the standards of April?

This just can't be a bunch of individual investors seeing a press release and buying.