US stock futures are slightly higher Tuesday following the Martin Luther King Jr. holiday and second-term inauguration of President Barack Obama. The market continues to methodically stair-step higher holding key levels in order to maintain bullish composure. Volume has been light and momentum has been lacking but overall the action has been constructive for swing traders. The S&P (INDEXSP:.INX) has held even higher than it “has to” in order to keep bullish sentiment intact. While we have seen healthy rest for most of the year following a fast start there hasn't yet been anything in the way of a ...