I'm a young investor. But, i've had nice scores with bio-techs. ACAD, THLD. Are the two. They all traded very odd and with little volume before their big pops. Why would this be no different. Also this company has a marketed drug. And a reverse doesn't seem smart or likely. When does their grace period go up for 180 days? Their next earnings is late april or early may. I am sure that will push the price up with an increase in Exalgo. Also, anymore reported data. Day to day doesn't matter. I was taught in school to 'BUY BUY BUY, HOLD HOLD HOLD, SELL SELL SELL. But who knows im only 20. But long hopefully i cant go wrong.
Personally, I'm a believer in Z having a positive outcome or I wouldn't be here. That said, a word of advise, you CAN go wrong and if you are not able to withstand/stomach a total loss you should not be in a bio-stock. I think Z is going to be a success with Z160 but should it fail the PhII trials the company will probably be a bust. My 2c. Best of luck.