Stocks traded in a narrow range Friday, settling for puny, mixed results. The Nasdaq eased 0.1%, while the S&P 500 barely rose. The IBD 50 slid 1.5%, hurt by Salix Pharmaceuticals’ (SLXP) 34% plunge. Volume fell across the board. Breakouts were scarce among stocks with high ratings. While the uptrend remains intact, the market clearly switched to pause mode during the week. Pauses can come in at least three varieties.