I see Apple up $7 in pre-market not $20 and most of the gains in pre-market are faded into the close not increased. Only if the general market goes up further than futures will Apple have a chance at gaining $20 today and I rate those chances at slim and none as most shorts covered in the burst from $530 to $550.
And with no great short participation no $20 spike as there is no covering rush!!! No at most maybe $574 will come your way but even that is not for sure. Still that is $12 and not a bad day!!!