Hi
Attached is your trigger.
In the constants you can set:
mbp - maximum back price for backing trigger
ba - back amount (and lay recoup amount)
mbo - minutes before the off for the opening back bet
mlp - minimum lay price for stop-loss activation
Please note because the stop-loss lay bet is triggered in-play and prices can move very fast, I have set the lay bet to "best" price. i.e. the lay bet will be fired at the best available price. This gives a better chance of the lay getting matched, however, you should be aware of the high liability of laying at big prices.
Please use test mode or Time Machine until you are confident with the trigger's operation.