ESH Chart, page-230

Shares go Up and Down Everyday...That's just what they Do....and for a whole lot of reasons.
Traders can't stay in one place too long as it ties up their Capital....Profit takers move in....Some see a share somewhere else they like and move on,Some get Nervous and Don't want a loss or to Average Down.
The trick is not to 'Try to Catch a Falling Knife',but Buy on the Back of Temporary Weakness when everyone else is Selling....The trick is to try to figure out if it's Temporary and when to Buy.And if it's a Falling Knife.
For my Money,The lower it goes,The more attractive this becomes. IMO DYOR