For CTRA bar: (CTRA)username(/CTRA)
For CTRA SS bar: (CTRA)ss/username(/CTRA)
For Bump n' Jump: (CTRA)bnj/username(/CTRA)
For mini CTRA bar: (CTRA)mini/username(/CTRA)
For mini CTRA SS bar: (CTRA)mini/ss/username(/CTRA)
For mini Bump n' Jump: (CTRA)mini/bnj/username(/CTRA)
Replace all the brackets () with square brackets []
And now we also have [ctra]random/username[/ctra] which selects a mini version of one of the three licence tiers randomly, so there's no need to fill up your signature with lots of licence bars .
EDIT: Fixed my lack of knowledge of my own system after being corrected by those below.