I wanted to make a graph history with my sales, but I don't know how to make a graph, which tell what rising and the downfall of sales. Currently I'm working with http://www.plus2net.com/php_tutorial/gd-linegp.php but it only do overall graph.
Item - Sale - date History
t-shirt 10 10/01/10 (graph goes here)
bag 15 10/02/10 (graph goes here)
Item - Sale - date History
t-shirt 10 10/01/10 (graph goes here)
bag 15 10/02/10 (graph goes here)