What is a profitable underlay?
 

I've started a new thread to avoid any confusion with past posts:
Based on Laying,

A Is a long term profitable underlay one where you get a price say 10% under the Average Lay price for say a 4th favourite based on thousands of results?

OR

B Is a long term profitable underlay one where you get a price say 10% under the True % chance of winning converted to price for say a 4th favourite based on thousands of results?

I think the answer is probably A because you'll never get a match for B?


RP