The 100-day moving average in the S&P 500 (SPX) broke with Friday's steep selling action, a warning sign for the index's forward momentum, according to Kevin Horner of Charles Schwab. In equities, he turns to Diamondback Energy (FANG) and its low-volume rally amid the energy trade's steady rise. Kraft Heinz (KHC) and its strong consolidation at the 200-day SMA is another interesting technical indicator Kevin is watching.