Stocks may struggle in the second half of the year due to technical signals, according to Michael Kramer of Mott Capital Management. Bulls had a strong start last week, but bears took control by the close. The S&P 500 and Nasdaq finished lower. Major equity indexes closed mostly higher, and a review of the market's 'vitals' is recommended. Declan Fallon's analysis covers the S&P 500, US Small Cap 2000, iShares Russell 2000 ETF, and NASDAQ Composite.