Hopefully I get this right as it's been over two years since I set up my ticker.
Click on the link to your profile,
then up the top of the page click on "signature"
on another page go to a ticker site (I used http://tickerfactory.com/ezticker/ticker_designer.php?type=3
Design your ticker how you like and click the next buttons down the bottom, and it will then give you a choice between two codes to cut and paste into your signature back on this site . (if one doesn't work try the other one)
Hope this works