From the "tips to help" post:
HOW DO I GET A TICKER???
1) Go to the ticker website of your choice (most popular is tickerfactory.com)
2) Design your ticker. Copy the BBC CODE (the 1st set of codes)
3) Come back here...go to USER CP, EDIT SIG.
4) Paste your code in your signature box and either click on PREVIEW OR you can just click SAVE.
This will place this new signature into EACH post you've ever done, or ever will do (until you alter your signature).
Some Signature information:
Signatures are dynamic, they do not stay with the posts made at the time they were there. If you change your sig, it'll change on ALL posts.
Also, if you want to TEST your signature, there is NO NEED to make a post saying "testing signature", simply find ANY old post of yours and reload it, the signature will be there. Promise.