hi
here is your trigger , in the constants you can set.
Bet amount
Minimum match minutes to place the bet
Minimum back price
you will have to load and monitor 1.5,2.5,3.5,4.5,5.5,6.5,7.5 and 8.5 over/under markets.
please use test mode until you are happy with your settings.
mcbee
download the trigger below