options are not for everyone. when stock price falls, options fall harder.
I would wait for a sudden pullback and pull trigger on Jan or later month(following monday may open Apr 2015) calls outright for $7 or higher strike price.
knowing upside and chances of success, there is a lot of money to be made with little risk, I agree.
I plan on converting all my $5 calls into shares that I purchaed when NWBO was at $3.5. its a no brainer trade for me now. I got those calls at 50 cents, and at one point in Feb/Mar these hit $5.75/contract. I was busy and did not sell any. well, they are coming back hard.