PokerTracker

The live winner+live win table group stats are useful, imo live losers+live loss would be much better: Loser's being more likely to deviate (read tilt) from their standard play than winners.

How would you define "loser"? There isn't a single loser in most pots, and I guess that what you're actually interested in is players who lost a lot of money, rather than just those that didn't win?

Yep the latter; players who took a loss of at least 10bb-15bb> was what I had in mind.

The amount won or lost by each player in the last 10 hands is stored in the database fields "live_cash_player.amt_won" (the last hand) and "live_cash_player.amt_won_1" to "live_cash_player.amt_won_9" (the previous 9 hands), so you could make a stat to display the total of that, or to count the number of hands where they won or lost a certain amount.

How about a table group with the biggest losers at the table+cumulative losses?

Player 1: -260 (BB/100)
Player 2: -189
Player 3: -144

Table groups don't have access to data about individual players, so you would need to display it for each player.