Plug Power in sharp but stable rise all session, levels to watch The stock has been on a sharp but stable rise all day, with a low near yesterday's close at $4.32 and a high at $5.07. At the current price of $5.02, the stock is up over 17%. On a longer-term basis the shares have broken out above the prior range high at $4.85 which has been in place since early May. This is a technical positive for the stock as is the breakout on 1.8 times normal trading volume. Next resistance is at $5.33.