Trader Brian Jones on Twitter: "It's bee a very tough premarket. So far I made a quick winning trade on HSDT and I still have PRTK but it's struggling. I did avoid a lot of P&D's like CBIO. Which is good." / Twitter

It's bee a very tough premarket. So far I made a quick winning trade on HSDT and I still have PRTK but it's struggling. I did avoid a lot of P&D's like CBIO. Which is good.