ZU - up huge premarket. Gapping above a strong resistance and clearing the 200 SMA. For a day trade, this is probably gapping too far to play today. However, give this a week or two... and one could buy the bounce. IF ZU pulls back to 17.52 (could do a limit buy off of that). DOUBT that ZU pulls all the way back to $15 but if it does, great buying location on the swing level.
On a Dow Theory level, this appears to be gapping out of an accumulation phase. :)