PokerTracker 4 complies with PokerStars terms of service and where necessary some functionality is limited when playing there such as the importing of observed hands and PokerStars rules on the coloring of HUD statistics.
PokerTracker 4 imports text hand histories that are saved to your computer by the PokerStars poker client. Once imported, these hands are stored within PostgreSQL and made available for review and analysis in your PT4 database.