MU is long from $21.77.  It is trading at $33.25 as of this writing.  From a technical perspective the stock is breaking out.  Please see the chart.

 

The new target zone is $39. to $47.  The reason for a wide target is that DRAM prices are often very volatile and move this stock over a wide range.

The new buy zone is $28 to $31.27.

What To Do Now

Those in the stock may consider continuing to hold.

Those not in the stock and are good at managing breakouts, may consider scaling in right here.