A clear drop (two clean candles on 5-15 min) bellow the current slightly will send the SPX to 2147; while a breakout above the current will send the SPX roaring to 2174. Knifing through either of these supports would mean ultra move to 2184 or ultra to 2133. Otherwise, I would expect bounces between the support levels, to guide where to take profit.
I would recommend tight stops at 2165 or 2160 , or while it upward past 2170 on Friday these stops will change accordingly. Price action may fall back into the so bias is slightly . However, it is August.