Calls are a good indicator of where AMD is headed. Look like we are going much higher from here. The upside pressure is building forcing the shorts to cover. The pressure is being put on those 140 + million shares short.
As buyers come in, the share price goes up.
As the share price goes up, the longs make money while the shorts lose.
This puts pressure on the shorts to cover.
As the shorts cover, the share price also goes up.