Hello Filipe Rodrigues,
Thanks for your interest in RadChart. You can review this example
which makes extensive use of the RadChart API to add, edit and delete series. Although the example is for web chart it provides you with the basic idea how to add series, axis items etc. For more concrete examples please refer to the QuickStart examples of the windows forms version of RadChart.
Let me know if it helps or if you need additional information.
the Telerik team