As you see the long term trend of equally linear lines accross the market. It shows that there's a top-end of 4k+ to be hit for the top or rather for big institutions to unload on the top.
I envsion this top reaches summer- early fall.
A great long here until this is a great move to do. Market has dipped last week and only for it to churn up more. ATH should be hit next week (3 more days till monthly close I belieave)