Since the all time high at 2878.50 (made in overnight session) to the Feb 6th low at 2529.00, we have a wide trading range established whose mid point currently is at 2703.75, about 1% away from the market currently. March has so far traded inside the value area of February and Friday's trade showed a rejection of lower prices and a 49 point rally from the 2647.00 low.
There's a shelf of volume on the composite profile between 2684-88 (see below chart, rhs). Whichever side can dominate above or below that area I'd suggest is in the driving seat today. If in doubt stay out, and that's what I'm doing for now as I'm not a fan of trading in the middle of ranges.