That will require custom statistics - see
this guide for the basics on custom statistics creation and
this guide for a deeper walkthrough. The size of a players bet on the flop is
cash_hand_player_statistics.amt_f_bet_made, the size of a players first raise on the flop is
cash_hand_player_statistics.amt_f_raise_made and if they make a second flop raise it is
cash_hand_player_statistics.amt_raise_f_made_2. If you need the bet/raise sizes faced by the player (amounts need to call) those are
cash_hand_player_statistics.amt_f_bet_facing,
cash_hand_player_statistics.amt_f_2bet_facing,
cash_hand_player_statistics.amt_f_3bet_facing and
cash_hand_player_statistics.amt_f_4bet_facing.