Market volatility is driving price action as indices try to rebound from early lows. Kevin Horner says the S&P 500 (SPX) must hold 6,775 to stay constructive. At the stock level, McCormick & Company (MKC) is testing key moving averages for a potential reversal, while Align Technology (ALGN) remains technically strong as long as it holds above its 50-day moving average.