Hi
Yes, you can add another trigger to your 1.5 / 2.5 trigger file.
lay
first matching selection
conditions:
selections trigger expression match_minute is equal or greater than 60
and markets betting code is correct score (soccer)
and selections index is equal to 6
and selections trigger expression football7_market_mbnum is greater than 0
the last condition checks there is at least one matched back bet in OU1.5