I was just beginning really trading. I did a first mistake that was to invest in pre-market (it was spiking and it was a new high) but had a great catalyst as they became the backup company for Epipen. The second mistake I made is that I didn't cut losses quickly. Short position I hold and was thinking the catalyst will play. It didn't. The only thing that played was the news announcing they were at Outperform. I sold at that moment. Not great