There is a "stack size in BB" custom stat for each game type available for free download from the
Customize PokerTracker section. If you prefer to see the monetary/chip amount just remove the division by the BB amount in the stat expression.
Please note that this is based on information from the end of the previous hand so is subject to errors if a player brings more money to the table, or rebuys or adds on in a tournament, so I wouldn't want to rely on it absolutely.
Tutorial: Custom Reports and Statistics