Hate to be the party pooper, but you need to do the maths with Lay prices before you buy the Ferrari. It's easy to fall into the trap of thinking that a big loss on the Back side translates to a big win on the Lay side. For example, I've grabbed a couple of months results (232 selections) for laying the #1 Price rank, #1 Vol rank, #1 SKY rank, # 1 Neural rank. It showed a -10.6 liability loss for the Layer.

However using Back prices less commission , a -1.68 liability loss for the Backers. See, the ************s still get their cut!

I got sucked in once, subscribing to a Ratings service that uses Betfair WAP to calculate profit/loss on strategies. Looked good, until you find out that WAP and SP can vary as much as 40%. Please be sure to back test with the right price, is all I'm saying