Collective opinion tells us that diversified portfolio is the closest thing to a free lunch in regard to trading. In this brief article, we're about to show how to detect hidden weak points in portfolio trading. See for yourself how Reports-Lab prevents from relying on "outlier profits" and constructing dangerous portfolio combinations.
http://www.alnissoft.com/index.php?option=com_content&task=view&id=29&Itemid=35
http://www.alnissoft.com/index.php?option=com_content&task=view&id=29&Itemid=35