[For Discussion] FCEL or PLUG?

There are many correlated stocks in the market.
E.g. FCEL and PLUG - the resemblance is even more obvious in the Min Chart.
In this case, which one will you focus on? and why? ------- Please share your opinions so that we are learn together :)

I will either Long FCEL purely cause it's more affordable or Short PLUG.
Note: My brokerage don't allow short selling.