I just figured this out myself. You can google trip tickers and get lots of different places to create a ticker, but I used magicalkingdoms.com. When it's created, you have to copy and paste it to your profile signature. To paste: click on your login name in the upper right hand corner, click on Customize Profile, go to "Edit Signature", paste the ticker there and save it. You can preview it to make sure it's what you want. The next time you post a comment, it will come up automatically.
Oh, and I had to use the BBCode or UBBCode, none of the others would work for me.
Good luck!