Charles Schwab's Kevin Horner breaks down key technical levels for the S&P 500 (SPX), with a sustained break above 7,800 potentially opening the door to 7,975. He also sees bullish setups in ServiceNow (NOW), which could target 166, and Ulta Beauty (ULTA), where a break above 625 would strengthen its uptrend. The charts continue to show improving momentum and higher lows.