Or you can simply click on your name in one of your posts and a menu will appear. The top one is to view your profile. On the next screen - on the right - is a link to view/edit profile. On the next screen you scroll down to the signature block. Paste the ticker. Scroll down some more and click on the submit button. If may require you to verify your password. Remember to only use the BB Code ticker code. HTML and EZ Code will not work. See this thread
for more details.