Yes, use a 'Set/Modify signal' rule applied to row 1
with a relative odds condition to test
selections back price
is less than
back price
Selection by order of favouritism 2
minus 1 tick
Then add a signal set condition to your main rule to test the;
Signal named (whatever you called it above) is set with a value
Or if you are just wanting to test its the home fav at the time the rule triggers (and not the pre KO home fav), then miss out the signal parts above and just add the 'Relative Odds Condition' directly to your main rule