 On most online poker sites , players can have the client software create a locally stored text file that records the hand history as shown in the ' Sample Hand History ' example . These hand histories summarize the details of the hand in a format that can be parsed by computer software . PokerTracker reads these files and extracts the relevant information , which it converts into a database for later review or statistical analysis . The software is capable of combining hand history details of multiple accounts from different online poker services , which allows a user to aggregate his or her data . Statistical summaries can be consolidated from different poker sites regardless of whether the user 's screen name is the same at each site . 
