You should sell:
1. Cut loss short
Any buy incurring over 5% loss should be trimmed by at least 60% on position;
2.Overall market is in downtrend;
3. NFLX chart pattern is seriously damaged, topping out.
4. Also, analysts downgraded NFLX, meaning its business may be flatting out or deteriating.
Of course, you can hope and wait, but the chance is no in your favor...