You are the active player. The other player is the first raiser on the river. You want to filter your position relative to the first raiser. Therefore you select:
Active Player Position Relative To
First RaiserThe active player position is the position of the player you
currently have selected in PokerTracker 4.
The lead aggressor position is the position of the player with the preflop initiative (can be the active player or opponent).
The first bettor position is the position of the player who bets that street (can be the active player or opponent).
The first raiser position is the position of the player who makes the first raise (2Bet) on that street (can be the active player or opponent).
The 3bettor position is the position of the player who 3Bets that street (can be the active player or opponent).
The 4bettor+ position is the position of the player who 4Bets or higher on that street (can be the active player or opponent).