An analyst expects Plug Power stock to more than double.Plug Power (PLUG 28.98%) is absolutely crushing the markets, surging a jaw-dropping 66% this week alone through Friday noon, according to data provided by S&P Global Market Intelligence.First deliveries of electrolyzers to a major site and a massive analyst upgrade has sent the hydrogen stock into a tizzy. Plug Power stock is on fireOn Friday, H.C. Wainwright analyst Amit Dayal upgraded Plug Power stock's price target to $7 per share from$3 a share. A ...