hi
here is a set of triggers that will choose the first matching market or a random matching market.
you did not give any conditions or market information, so i used the match odds market.
you can see with the 2 betting triggers how to use first matching market or a random matching market.
in the constants you can set
Bet amount
Bet placing r=random market index f=first matching market
please use test mode until you are happy with your settings
mcbee
download the trigger below