has formed a nice price channel
which is very useful for finding attractive entry points. I recommend increasing your position when there's a 2.4% pull back from the upper red trend line
(see chart). Definitely buy if there is a 3% or more pull back from the upper red trend line
. As of 6/1/14 that translates to a price in the neighborhood of $109.50 - $111.
My target price for the overall uptrend is $140.