So, I attach a picture with the expected chart. What I don't know is how to add the yellow graph(serie), which is representing the total of the others two graph(series). Please, some suggestions!:kiss: size=372]http://www.jasperforge.org/components/com_joomlaboard/uploaded/images/Time_series_chart1.jpg Post edited by: cris_tyna, at: 2007/06/11 13:56