Yesterday arvo I was at my computer for a few hours and I experimented on a Lay system.

I looked at Betfair's prices a minute before start time and identified those at single figures - there must be a minimum of three single-priced selections. Then I checked Unitab's rankings for these horses and layed the worst ranked. If there were two of these worst ranked selections I did not bet, and if the selection was resuming from a spell I also did not bet.

I layed 11 selections for 11 smiles, and laying for a liability of $33 the profit was $76.29.

I hope to do more of this laying method today.