In the june selloff,the market hit bottom the third day of selling, right near the open.
I still think you cant lose buying at 3300, if we drop that far today. IMHO, there will be a short term buy,as in good for a couple days, in the first half hour of trading.
Or wait for the first short rally to fail, and buy on the next dip.
Tech will come back, although I think more than a 2 day rally may not be possible.