Hi Mark,
Close, but no cigar!
For some reason, match_3_back_matched is not recognised in the ra formula.
I tried moving the triggers around, I tried putting brackets around the match_1 and match_3 variables, but it still ignored match_3_back_matched.
I tried varying the times the bets were placed, but no luck.
In summary, bets for match_1 and match_3 were placed, but the balance bet for match_2 was always too high (by the amount placed on match_3).
I'll keep playing around with it unless you have any better ideas.
Thanks for your trouble,
Bobh