You can write above the ticker by going back into your User CP and clicking on edit signature...
Click preview signature to see if it is there, you can pick the different font sizes to make the print smaller or bigger.
If you use black instead of colour you will use less space, you still might be short on space in your signature as you don't as yet have 50 posts...with 50 posts you will have a huge signature space and should get everything you want in it.