Very simple chart here, it has broken out of the wedge and is looking steady in its upward trend, there is very little in its way here from going a lot higher, although at a slow rate.
Munger said he is addicted to $COST so I won't be too surprised to hear that he has been adding in this quarter when his updated holdings are released.
A retest of the wedge from above would be ideal if we have members who would like to start a position here. However, anywhere here is a good buy if you intend to hold for the next 12 months, buying now and buying again if it retests the wedge is also a very sensible strategy.