OK while you're in the part where you can type what you want to post, you'll see a little picture of a mountain (insert image icon) above the posting screen. On my screen it's a mountain, yellow sky, little sun. Click that and in the box that pops up, put in the part below.
If you want it in your signature, just go to the user control panel
says user CP at the top of the page, then to edit signature then the same thing with the image insert icon
Just cut and paste this, it's your ticker link. I'm so sorry if I've confused you even more.
http://tickers.TickerFactory.com/ezt/d/3;10717;62;0;0/c/-26/t/-55/k/fc4f/weight.png