Hi
you can't do that in the Locator, so it's best to load the markets and use a trigger to delete the games that do not have all the markets.
this will delete soccer games that do not have OU3.5 / OU4.5 / OU5.5 (you can add the others if you want using the prefixes)
use condition blocks as shown:
TRIGGER
delete market
selections: favourite
markets: soccer games
execute: once per market
conditions:
OR NOT
selections trigger expression football9_market_parent_id is greater than 0
OR NOT
selections trigger expression football10_market_parent_id is greater than 0
OR NOT
selections trigger expression football11_market_parent_id is greater than 0