hi
here is your trigger, in the constants you can set
Lay bet amount
Minimum starting price
Maximum starting price
Maximum back price then place the back bet
Back bet l=lay liability f=fixed bet amount
Back bet amount for ( fixed bet amount)
if you use the liability for the back bet the loss on the selection will be 0 , but if the selection goes on to loose the liability on the other selection is very high.
please use test mode until you are happy with your settings
mcbee
download the trigger below