Well sessions won or lost in tracker doesnt mean anything as you can stay on a table for one orbit, leave and voila youve recorded a loss of a SB and BB for one session.

Thus said, I record all my sessions in an excel spreadsheat and use that to compare and view my pogression.

sessions being:
-date and time of starting session.
-duration
-level
-#hands
-#tables
-Return$, return BB
-ReturnBB/100
-win rate
-total returns.