Here is something to help you out with laying. Here is a pure R&S laying system that has a positive expectation of approx 11%.

First the resultsfor the last 3 months (Assuming 5% commission):
Selections : 217
Strike rate : 23 / 217
Profit on laying to a risked liability of $100 : $1257.08

Month 1: $ 97.75
Month 2: $634.88
Month 3: $524.44

The rules :

1. Go to the neurals. Only look at TA and CF. Find the ranking of each one in the list and write it down. Any horse which has a combined ranking of 21 ( ie trainer = 10th rank and cf = 11h rank) is a selection.
2. Only lay up <= $10 on betfair.
4. The above is done pre-scratchings. So you can work out the selections the night before and then just worry about watching the price on raceday.

What is logical about the system rules?
The system is designed to find a trainer who is out of form/does not perform at this track with a mediocre horse in a large field at a price which is low enough to not be a risk to our bank.

Feel free to fiddle with it and add extra filters.

This weeks selections:

Hawkesbury	8	.	PATIO	came	3
Ipswich	7	.	KOLO	came	3
Ipswich	7	.	WILD PROMISES	came	1
Ipswich	8	.	GUNNER KNOX	came	1
Ipswich	8	.	ZEROAD IN	came	13
Coffs Harbour	4	.	WAR MACHINE	came	4
Coffs Harbour	7	.	MR WIGGLES	came	1
Eagle Farm	8	.	JAZZ HEART	came	9
Eagle Farm	8	.	LISTEN SON	came	1
Gold Coast	4	.	ALETHEIA	came	3
Moonee Valley	9	.	KATIE LEE	came	9
Ascot	6	.	OUR OL' FELLA	came	10
Ascot	8	.	EXTRA BEAT	came	10
Sunshine Coast Cushion Track	7	.	MARTHA'S VINEYARD	came	10
Nowra	6	.	MONTE LEO	came	4
Nowra	7	.	BLACK ROCK	came	9
Nowra	7	.	ELLIOTT STREET	came	4
Sale	3	.	GEORGEALMIGHTY	came	8
Sale	9	.	KING COBWEB	came	7
Terang	6	.	SYLVAN O'REILLY NZ	came	7
Hobart	1	.	BAMAEDGE	came	2
Hobart	6	.	WHISKEY FELLA	came	13
Hobart	8	.	MUSQUI	came	9
Coonabarabran	5	.	UNIKIN	came	2