Charles Schwab's Kevin Horner urges investors to brace for a potential pullback in the SPX that could bring the index back to the 50-day SMA. He explains how the 6,100 level, currently below that 50-day metric, backs his reasoning. Turning to individual stocks, Kevin has his eyes on Zeta Global (ZETA) as the 20-day SMA crosses above the 200-day SMA. After Palantir's (PLTR) significant pullback, he sees $152 as new support, or $126 if selling picks up steam.