Need Help In Flash/Flex Line Charts...Output should be like stock exchange chart

Hello Friends,

I need a small help from you guys.

I want to do a line chart example in flash cs3 or in flex. Actually my requirement is getting the data from external file ie xml and with that i want to display a line chart with some time interval just like stock exchange charts for example.

I have to do this either in flex or in flash cs3. i dont have any ideas how to proceed. can anyone help me out on this. i need it asap.