$20's? Don't think so. Earnings estimates for fiscal 2019 are still above $7, and fiscal 2019 is half over. And ... MU did beat this quarter's earnings estimates! At today's price, MU is trading at a PE of 5. Historically, at this point in the memory cycle, MU would have negative earnings.
Below $40, then what?
I don't have a clue. Does it bounce then, or does it go to $36? That's beyond my ability to figure out.
But, I drew a down-fork anyway. That suggests MU bounces at $40.