A days-to-cover ratio of over 18 would usually imply a massive short squeeze. However, the ratio is only that high because of a substantial reduction in volume. The ratio should really be around 9 with regular volume (which is still high) but the loss in interest by the market (as shown by the reduction in volume) neutralizes the benefit. This stock could go up but it won't be due to a short squeeze.
The problem with OLED right now is that Samsung is not included in Q1 and Q3 and it's like people forget that. People hate the stock too much in Q1 and Q3 but love it too much in Q2 and Q4.