Stocks were higher Thursday, although some leaders closed below their 50-day moving averages. Amedisys (AMED) jumped 3.14 to 54.45. The gains came as volume was nearly twice the stock's 50-day average. The company made a presentation at a JPMorgan health conference. The stock built the right side of a base starting in December and broke out. It is now 16% extended from its 46.83 buy point. Baidu (BIDU) broke out from a base. The Chinese Internet