The U.S. dollar has been range bound for weeks, but if Federal Reserve Chair Janet Yellen sounds more upbeat about the labor market in her testimony to Congress this week, analysts say the greenback could test recent highs against several currencies. "The U.S. dollar has been in consolidation mode. If Janet Yellen comes out sounding fairly hawkish and suggests the rate hike cycle could start in the middle of the year, the dollar could rise," said ANZ senior currency strategist Khoon Goh. The greenback has been waiting for a fresh catalyst for a month following its near 19 percent surge from September to 95.50 in ... (full story)