I mean , i receive a collection in wich i have a date , a value and a client.for example like this : 2007 180,4 leo 2008 12,3 mike 2009 12345 leo ... i want a serie for client Leo and a serie for client mike . is that possible ?? considering that i dont know how many series im going to receive. i know i didn't express myself clearly before. thanks in advance. Leo