Catching a sector early as it rotates out of a slump is one of the more reliable ways to get ahead of an emerging trend. You just have to make sure the rotation has enough strength to follow through. On Thursday morning, as the markets maintained a cautiously bullish tone, I checked the New Highs panel on the StockCharts Dashboard, scanning the 1-, 3-, 6-, and 9-month highs list. A clear theme emerged—biotech and healthcare...