To get a ticker into your signature, do the following:
Go to a tickersite like and create a ticker.
Once you created your ticker, copy the 'BBCode' that has been created for you. It's usually underneath the image of the ticker you just made.
Open your 'User CP' on this forum. The link is located at the top-left of the page, in the blue bar. Once you get to your User CP, look at the list on the left-hand side on the page. Under the header 'Settings & Options', you will find 'Edit your signature'. Click that.
Paste the code that you got from Ticker Factory into the text-box that comes up, and that should be it, ticker created!
If the option 'Edit your signature' doesn't show up, go to 'Edit Options' in your User CP, and scroll down about half way until you find 'Thread Display Options'. Make sure that 'Show signatures' is ticked.