As FlagHippo mentioned, Chico Poker requires a hand converter and they require much more than a hand converter because Chico actively monitors for them therefore the converter needs to evade detection otherwise your account will be frozen.
The only one that we can currently recommend, if it is within your risk tolerance, is the Advanced Chico Converter by AdvancedPokerTools. Using any other converter, you run a serious risk of being banned from the site (and possibly losing your funds).
PokerTracker will NEVER natively add support for a site where a HUD is not permitted and that is why we have not and will not add native support for Chico. With that said, if your risk tolerance allows for you to run a third party converter then we cannot stop you.
We have much higher standards for PokerTracker than some competitors who will add any site on a whim even at the potential risk of you the player.