Hi
The market_score variables show 0-15, 40-30, 15-15 etc. during a game.
The market_score variables show 0-1, 1-0, 2-1 etc. after the game points.
So you can use:
and selections trigger expression market_score1+market_score2 is less than 15
You can qualify that by also using previous score:
AND
selections trigger expression market_pscore1 is equal to 40
or selections trigger expression market_pscore2 is equal to 40