Biogen exploded to the upside today after ...

Shares of Biogen soared 30% on Tuesday after the drugmaker announced it was seeking regulatory approval for an Alzheimer’s drug, aducanumab, it said it was giving up on earlier this year.

“It would be the biggest drug ever,” CNBC’s Jim Cramer said on “Squawk on the Street.”

But the reason for this post is to show a monster 85-point open gap getting filled in one day - opening another big gap in the process. Moral... gaps get filled.