With a recent answer that was well received that I posted, I (at time of posting) have gained a score of 63 for the atari-2600, gaming-history, and e.t.-extra-terrestrial tags. Currently, that makes 1 answer, with a score of 63 for each of these tags, which you can see in the screenshot below:
Now out of the list of my trackable badges, none of these three are available to choose from. When does a tag become trackable? I've noticed that none of these tags have 20 or more questions. Is that why (since you need to have at 20 answers posted for each tag)?