i wanna customise the charts basically i dnt want to use the default styled charts in my app which is meant for W8, help me in customising. Please suggest me the links where i can understand the charts customising easily
RadChart for Windows 8 HTML has numerous customization options. To achieve a custom look like the one on the image you attached, you need to change the properties of almost all of the visual elements of the control. Here are two links that you can start from:
The second article contains links to other articles that hold more detailed information regarding each visual element. I have also attached a working example project with a RadChart customized to look like the one from your screenshot.
I hope this helps. In case you need further assistance or have questions do not hesitate to ask.