$COST has had a parabolic move this week, it was below its 50 Day MA last week and the moment it went above the 50 Day, it took off.....this is likely down to the enormous queues outside a $COST store in China when it opened this week, it was an very impressive show of attraction from Chinese consumers.
$COST is not fundamentally attractive here and is extending now.
I have added in another potential Wave 5 target here above the 2.27 Fib at $808 but I don't see this going much higher with this set up.
A pull back is needed and it is not worth the risk chasing here when other stocks are showing a reversal after completing Wave C.....like $BABA and $BIDU.