Hi and welcome
Your trigger should look something like the attached screenshot. You will need to refer to the help file to understand the trigger variables etc. I will explain the last condition's variable: r_1_back_price
r_ is variable prefix for rank
r_1_ is rank 1 (favourite)
back_price is back price
so the whole condition:
and second favourite's back price is equal or greater than r_1_back_price + 2.00
is your specification:
that they must be the favourite by an odds gap of at least 2.0 at the same time (20 seconds before the off) Please test all triggers in test mode.
If you wanted a trigger written for you, you can put in a free trigger request
here.There is a learning curve for MFP but it will pay dividends.