This post was just published on ZYX Buy Change Alert.
For those who jumped on these stocks at the time of the post, there are decent gains. BLDP is at $5.25 and PLUG is at $8.30 as of this writing. The trend is for such momentum stocks to trade higher in the pre-market the next day. However, it never pays in the long run to look at a gift horse in the mouth. For this reason consider taking profits on half of the position in each stock before the close and hold rest for tomorrow.