Day 34

Win Lay System - Day 34
Today's starting bank: 3843.01
Today's profit: -144.22
Profit since 28/09/2009: 1698.79
New bank: 3698.79
New stake liability: 153.72 (unchanged)

Today's strike rate: 41 wins from 45 selections = 91.11%
Strike rate since start: 759 wins from 815 selections = 93.13%

Projections for 27/09/2010
Strike rate: 8145 wins from 8749 selections = 93.1%
Profit: £912,376.81

A few weks ago, I was amazed when I layed the winner of three consecutive races. I thought that that was highly unlikely to happen again for years. It happened again today. The day started very well, and I thought I was heading for millions again.


Place Lay System - Day 14
Today's starting bank: 1326.47
Today's profit: 24.56
Profit since 18/10/2009: -148.97
New bank: 1351.03
New stake liability: 15.00 (unchanged)

Day 33

Win Lay System - Day 33
Today's starting bank: 3640.87
Today's profit: 202.14
Profit since 28/09/2009: 1843.01
New bank: 3843.01
New stake liability: 153.72

Today's strike rate: 34 wins from 34 selections = 100%
Strike rate since start: 718 wins from 770 selections = 93.25%

Projections for 27/09/2010
Strike rate: 7942 wins from 8517 selections = 93.25%
Profit: £1,655,398.95


Place Lay System - Day 13
Today's starting bank: 1234.75
Today's profit: 91.72
Profit since 18/10/2009: -173.53
New bank: 1326.47
New stake liability: 15.00 (unchanged)

Day 32

Win Lay System - Day 32
Today's starting bank: 3354.07
Today's profit: 286.80
Profit since 28/09/2009: 1640.87
New bank: 3640.87
New stake liability: 146.09 (unchanged)

Today's strike rate: 29 wins from 30 selections = 96.67%
Strike rate since start: 684 wins from 736 selections = 92.93%

Projections for 27/09/2010
Strike rate: 7797 wins from 8395 selections = 92.88%
Profit: £1,083,961.69


Place Lay System - Day 12
Today's starting bank: 1196.83
Today's profit: 37.92
Profit since 18/10/2009: -265.25
New bank: 1234.75
New stake liability: 15.00 (unchanged)

Day 31

Win Lay System - Day 31
Today's starting bank: 3124.77
Today's profit: 229.30
Profit since 28/09/2009: 1354.07
New bank: 3354.07
New stake liability: 146.09 (unchanged)

Today's strike rate: 32 wins from 33 selections = 96.97%
Strike rate since start: 655 wins from 706 selections = 92.78%

Projections for 27/09/2010
Strike rate: 7714 wins from 8313 selections = 92.79%
Profit: £816,600.60


Place Lay System - Day 11
Today's starting bank: 1189.31
Today's profit: 7.52
Profit since 18/10/2009: -303.17
New bank: 1196.83
New stake liability: 15.00 (unchanged)

Day 30

Win Lay System - Day 30
Today's starting bank: 3363.72
Today's profit: -238.95
Profit since 28/09/2009: 1124.77
New bank: 3124.77
New stake liability: 146.09 (unchanged)

Today's strike rate: 22 wins from 25 selections = 88%
Strike rate since start: 623 wins from 673 selections = 92.57%

Projections for 27/09/2010
Strike rate: 7577 wins from 8188 selections = 92.74%
Profit: £433,099.72


Place Lay System - Day 10
Today's starting bank: 1324.57
Today's profit: -135.26
Profit since 18/10/2009: -310.69
New bank: 1189.31
New stake liability: 15.00 (unchanged)

A poor ending to my first month.

Patience and discipline, Allan. Patience and discipline.

Day 29

Win Lay System - Day 29
Today's starting bank: 3539.38
Today's profit: -175.66
Profit since 28/09/2009: 1363.72
New bank: 3363.72
New stake liability: 146.09 (unchanged)

Today's strike rate: 35 wins from 38 selections = 92.11%
Strike rate since start: 601 wins from 648 selections = 92.75%

Projections for 27/09/2010
Strike rate: 7564 wins from 8156 selections = 92.74%
Profit: £1,334,354.48


Place Lay System - Day 9
Today's starting bank: 1324.42
Today's profit: 0.15
Profit since 18/10/2009: -175.43
New bank: 1324.57
New stake liability: 15.00 (unchanged)

Weekly targets

For my amusement, I'll post graphs comparing my actual profit/loss with a target that's based on historical records. The win lay system target is 2% of bank per day. The blue line is my actual profit/loss since the beginning, and the red line is the target extended for another week.

For the place lay system, the target is 2.7% of bank per day.

Day 28

Win Lay System - Day 28
Today's starting bank: 3638.63
Today's profit: -99.25
Profit since 28/09/2009: 1539.38
New bank: 3539.38
New stake liability: 146.09 (unchanged)

Today's strike rate: 30 wins from 34 selections = 88.24%
Strike rate since start: 566 wins from 610 selections = 92.79%

Projections for 27/09/2010
Strike rate: 7378 wins from 7952 selections = 92.78%
Profit: £2,419,315.19


Place Lay System - Day 8
Today's starting bank: 1391.34
Today's profit: -66.92
Profit since 18/10/2009: -175.58
New bank: 1324.42
New stake liability: 15.00 (unchanged)


Maria's System after 4 weeks
Strike rate: 237 wins from 290 selections = 81.72%
Profit: 756.36

Day 27

Win Lay System - Day 27
Today's starting bank: 3652.37
Today's profit: -13.74
Profit since 28/09/2009: 1638.63
New bank: 3638.63
New stake liability: 146.09 (unchanged)

Today's strike rate: 39 wins from 42 selections = 92.86%
Strike rate since start: 536 wins from 576 selections = 93.06%

Projections for 27/09/2010
Strike rate: 7241 wins from 7787 selections = 92.99%
Profit: £4,698,244.43


Place Lay System - Day 7
Today's starting bank: 1191.87
Today's profit: 199.47
Profit since 18/10/2009: -108.66
New bank: 1391.34
New stake liability: 15.00 (unchanged)

Day 26

Win Lay System - Day 26
Today's starting bank: 3532.62
Today's profit: 119.75
Profit since 28/09/2009: 1652.37
New bank: 3652.37
New stake liability: 146.09

Today's strike rate: 43 wins from 46 selections = 93.48%
Strike rate since start: 497 wins from 534 selections = 93.07%

Projections for 27/09/2010
Strike rate: 6977 wins from 7497 selections = 93.06%
Profit: £6,604,663.06


Place Lay System - Day 6
Today's starting bank: 1223.45
Today's profit: -99.83
Profit since 18/10/2009: -308.13
New bank: 1191.87
New stake liability: 15.00 (unchanged)

So far, the win lay system is increasing its bank by more than a compounding 2% per day. There's not many banks that offer an interest rate like that!

The place lay system is going through a bad period, but I still think it will pull through in the end, even if it does need a reduction in stakes.

Day 25

Win Lay System - Day 25
Today's starting bank: 3442.00
Today's profit: 90.62
Profit since 28/09/2009: 1532.62
New bank: 3532.62
New stake liability: 141.30

Today's strike rate: 38 wins from 40 selections = 95%
Strike rate since start: 454 wins from 488 selections = 93.03%

Projections for 27/09/2010
Strike rate: 6623 wins from 7125 selections = 92.95%
Profit: £6,192,116.72


Place Lay System - Day 5
Today's starting bank: 1223.45
Today's profit: 68.25
Profit since 18/10/2009: -208.30
New bank: 1291.70
New stake liability: 15.00 (unchanged)

Stats

I posted some stats about the historical data for the place lay system recently. Here's the same info on the win lay system.

For the 669 days since December 2007, there were 420 (63%) winning days. The highest win on a day was £795. The biggest losing day was £741. That's to a fixed liablility of £100 per selection with commission deducted. There was a sequence of 8 losing days in a row, and 11 winning days in a row.

Here's a graph showing the average profit per race (in £s) for each calander month. As you can see, only August shows a loss. Hopefully I'll have already made my millions before August! :)

I suppose I could turn it into a backing system in August?

Day 24

Win Lay System - Day 24
Today's starting bank: 3511.99
Today's profit: -69.99
Profit since 28/09/2009: 1442.00
New bank: 3442.00
New stake liability: 140.48 (unchanged)

Today's strike rate: 41 wins from 44 selections = 93.18%
Strike rate since start: 416 wins from 448 selections = 92.86%

Projections for 27/09/2010
Strike rate: 6323 wins from 6813 selections = 92.81%
Profit: £5,928,170.56


Place Lay System - Day 4
Today's starting bank: 1263.40
Today's profit: -39.95
Profit since 18/10/2009: -276.55
New bank: 1223.45
New stake liability: 15.00 (unchanged)

Today's strike rate: 77 wins from 95 selections = 81.05%
Strike rate since start: 270 wins from 357 selections = 75.63%
Winning days: 0
Losing days: 4

I had a closer look at the data and discovered that the bad period was from mid November to just before Christmas, so I decided to continue with the system. My decision was rewarded with my fourth consecutive daily loss. I still don't know what it's like to have a winning day with this system!

System abandoned

I've decided to abandon my Place Laying System. Further analysis of historical data shows that the system doesn't work at this time of year. This graph shows the average profit (in £s) per race for each calander month. November is the only unprofitable month of the year and December is barely profitable. October does okay, but we're at the end of it and I think the bad times may have begun.

I've lost £200, but I think it's been worth the lesson that I need to check if a system is seasonal. There's probably more that I can learn from this.

Is it just the cold weather?
Is it the change of going?
Is this system mainly for flat and all weather racing?
Is it certain racecources?

Anyways, it looks like a system that should do well from March to October.

I also need to get more data from before Sept 2008 to help provide a clearer picture.

Day 23 results

Win Lay System - Day 23
Today's starting bank: 3381.47
Today's profit: 130.52
Profit since 28/09/2009: 1511.99
New bank: 3511.99
New stake liability: 140.48

Today's strike rate: 18 wins from 18 selections = 100%
Strike rate since start: 375 wins from 404 selections = 92.82%

Projections for 27/09/2010
Strike rate: 5948 wins from 6411 selections = 92.78%
Profit: £11,335,901.50


Place Lay System - Day 3
Today's starting bank: 1300.52
Today's profit: -37.12
Profit since 18/10/2009: -236.60
New bank: 1263.40
New stake liability: 15.00 (unchanged)

Today's strike rate: 43 wins from 58 selections = 74.14%
Strike rate since start: 193 wins from 262 selections = 73.66%

Losing runs

I've used many systems in the past that have begun very well. Then I'd increase my stakes, and immediately the system would start to lose, and I'd give up on them. These were systems for which I didn't have historical data, because there wasn't any. They were different types of systems to these.

My new place laying system has started badly with two consecutive losing days. In the past that would have freaked me out, and I might have given up on it, or given it just one more day. Although I'm disappointed, I'm not about to pack it in, because according to the historical results, it should recover the losses and go on to become profitable. Here's the graph that represents the profit growth of the system since September 2008. This is to a fixed liability of £15 on each selection. Commission has been deducted.



The perfect system for me would be one that shows a graph with a straight diagonal upwards line. Until I find it, I will have to make do with what I've got; a system that has winning and losing days. Of those 406 days, 176 (43%) produced losses. There were 6 consecutive losing days, but there were also 13 consecutive winning days. One day it would have lost £232, but there was also a day where it would have made £598.

So unless I get results that are worse than these, I won't be packing it in.

PS It's hard to tell from the graph, but it also started badly, and was losing £127 after the first two days.

Day 22 results

Win Lay System - Day 22
Today's starting bank: 3243.39
Today's profit: 138.08
Profit since 28/09/2009: 1381.47
New bank: 3381.47
New stake liability: 135.26

Today's strike rate: 20 wins from 21 selections = 95.24%
Strike rate since start: 357 wins from 386 selections = 92.49%

Projections for 27/09/2010 - Corrected.
Strike rate: 5941 wins from 6404 selections = 92.77%
Profit: £11,113,705.11



Place Lay System - Day 2
Today's starting bank: 1404.37
Today's profit: -103.85
Profit since 18/10/2009: -199.48
New bank: 1300.52
New stake liability: 15.00 (unchanged)

Today's strike rate: 57 wins from 82 selections = 69.51%
Strike rate since start: 150 wins from 204 selections = 73.53%

The place laying system results

The win laying system results are in the previous post. This post is about my new place laying system.

Today's starting bank: 1500.00
Today's profit: -95.63
Profit since 18/10/2009: -95.63
New bank: 1404.37
New stake liability: 15.00 (unchanged)

Today's strike rate: 93 wins from 122 selections = 76.23%

As with the win laying system, the historical data shows good profits for this system over a period of more than a year. I'm starting with a £1500 bank, and the stake liability is 1% of my current bank. As before, I won't reduce my liability as my bank decreases, unless it reaches a particular level. In this case it will be £1000, or close to it. If the bank increases, then the liability will drop when it reaches 65% of the highest level.

Unfortunately I chose the wrong day to begin, and yesterday would have been a bad day too, so I need a good day soon.

Day 21 results

Today's starting bank: 2955.65
Today's profit: 287.74
Profit since 28/09/2009: 1243.39
New bank: 3243.39
New stake liability: 129.74

Today's strike rate: 37 wins from 37 selections = 100%
Strike rate since start: 337 wins from 365 selections = 92.33%

Projections for 27/09/2010
Strike rate: 5610 wins from 6049 selections = 92.74%
Profit: £8,827,996.83

Three weeks into system, and it's going better than I could have dreamed, but it's early days, and I won't be placing my order for a Porche just yet!

I've now analysed the place data, and today I began using my place laying system. I'll hopefully be back later tonight to post the results.

I've had a couple of comments recently about me not posting the names of my selections or the criteria for selecting them. I'll respond to them here in the hope that others will see it.

I said at the start that I wouldn't be posting those details, and there is a very good reason for it. Maria posted her selections for a year but then stopped because she was finding it increasingly difficult to get her bets matched at reasonable prices. She used other systems as well which she didn't post the selections for, and she didn't have the same problem betting those. Maria never gave away the criteria for selecting her lays, obviously because it would render the system useless. She posted her selections for a year because she was confident that there was no way that readers could work out how she was arriving at them. Unfortunately that doesn't apply to my selections. I think someone could quite easily see a pattern to my selections. I intend to investigate more systems over time, and if I think that one of them couldn't be worked out from the selections, I'll post them; at least for a while. I'm sorry if that is disappointing.

Listen to me talking as though I've found the goose that lays the golden eggs. It's still very early days. I'd be delighted if I could just get back all the money I've lost at Betfair. At least I'm slowing down my losses!

I started comparing my system with Maria's after every 100 selections, but since I've increased my number of selections, I think that would be too often, and it wouldn't be a sensible comparison either. So I've decided to do it once a week. Here's where Maria was at after three weeks:

Maria's Laying System after three weeks.
Strike rate: 174 wins from 213 selections = 81.69%
Profit: £407.41

Day 20 results

Today's starting bank: 2718.76
Today's profit: 236.89
Profit since 28/09/2009: 955.65
New bank: 2955.65
New stake liability: 118.23

Today's strike rate: 44 wins from 47 selections = 93.62%
Strike rate since start: 300 wins from 328 selections = 91.46%

Projections for 27/09/2010
Strike rate: 5217 wins from 5676 selections = 91.91%
Profit: £2,357,442.34

Day 19 results

Today's starting bank: 2474.39
Today's profit: 244.37
Profit since 28/09/2009: 718.76
New bank: 2718.76
New stake liability: 109.00 (unchanged)

Today's strike rate: 43 wins from 44 selections = 97.73%
Strike rate since start: 256 wins from 281 selections = 91.1%

Projections for 27/09/2010
Strike rate: 4650 wins from 5072 selections = 91.68%
Profit: £1,266,256.28

I made a change to the system today that increases the number of selections. I've removed the filter on prices because the historical data shows that it should increase profits overall. It should also help maintain a low commission rate, and it will mean there will be more races in which I have more than one runner. This will mean I will gain a commission benefit where I've layed the winner as well as a loser or two.

I'm still looking for other ways to improve profitability, and I still plan to analyse the place market data.

Day 18 results

Today's starting bank: 2448.56
Today's profit: 25.83
Profit since 28/09/2009: 474.39
New bank: 2474.39
New stake liability: 109.00 (unchanged)

Today's strike rate: 15 wins from 17 selections = 88.24%
Strike rate since start: 213 wins from 237 selections = 89.87%

Projections for 27/09/2010
Strike rate: 4320 wins from 4806 selections = 89.89%
Profit: £154,092.29

All the shorties I've layed recently have been winning with monotonous regularity. That's frustrating because it would make a huge difference to my profits if I could get my fair share of losing shorties. I finally got one beat late on today.

This graph represents the system's profit growth since the introduction of the BSP in December 2007. This is to level liability bets of £100 with commission deducted.

Day 17 results

Today's starting bank: 2725.06
Today's profit: -276.50
Profit since 28/09/2009: 448.56
New bank: 2448.56
New stake liability: 109.00 (unchanged)

Today's strike rate: 6 wins from 9 selections = 66.67%
Strike rate since start: 198 wins from 220 selections = 90%

Projections for 27/09/2010
Strike rate: 4252 wins from 4724 selections = 90.01%
Profit: £158,795.57

I'm making a slight change to the system which is not due to today's poor results, but analysis of historical results show that it's best not to lay my selections in races where there is a small number of runners.

Day 16 - Another profitable day

Today's starting bank: 2724.57
Today's profit: 0.49
Profit since 28/09/2009: 725.06
New bank: 2725.06
New stake liability: 109.00

Today's strike rate: 6 wins from 7 selections = 85.71%
Strike rate since start: 192 wins from 211 selections = 91%

Projections for 27/09/2010
Strike rate: 4379 wins from 4813 selections = 90.98%
Profit: £1,881,759.29

Number crunching

By converting the odds of my 204 selections to their implied probability of winning; taking an average of those probabilities, and converting that average probability (12.35%) back into betting odds, I calculate that my average odds are 8.10. I'm doing slightly better than BSP which is 8.24.

The biggest factor in producing my current profit is that the horses I'm selecting lose more often than their prices suggest they should; 91.18% compared with 87.65%. That means seven horses have lost that could reasonably have been expected to win. So although I'm delighted to be ahead, these are relatively small numbers that I'm dealing with. If those seven horses win today, I'll be in the red.

The 91.18% strike rate is much higher than I had expected, and the £3.2 million question is WHY? Most likely it is down to the fact that 204 selections is too small a sample, and that the strike rate will gradually decrease. However there is another factor which has provided a higher strike rate compared with what the historical data led me to expect. When looking at the historical data, I only considered horses up to a maximum BSP of 16.0, which is my cut off point. My 204 selections include 45 with a BSP higher than 16.0, of which only 3 have won. Those 45 provide a strike rate of 93.33%.

I'm a bit wary of today's selections as they include two or three short priced ones, and I'm now expecting the high SR to be corrected. I'm also starting to think that my stakes liability is probably a bit too high at 4% of my bank. I'll leave it for now though.

Day 15 results

Today's starting bank: 2561.36
Today's profit: 163.21
Profit since 28/09/2009: 724.57
New bank: 2724.57
New stake liability: 108.98

Today's strike rate: 14 wins from 14 selections = 100%
Strike rate since start: 186 wins from 204 selections = 91.18%

Projections for 27/09/2010
Strike rate: 4526 wins from 4964 selections = 91.18%
Profit: £3,238,807.63

That's a relief; after yesterday I was worried that I wasn't going to make my million. :)

Over 200 selections layed now, so time to compare with Maria's system at the same stage.

Maria's strike rate: 174 wins from 213 selections = 81.69%
Maria's profit: £407.41

Day 14 results

Today's starting bank: 2539.84
Today's profit: 21.52
Profit since 28/09/2009: 561.36
New bank: 2561.36
New stake liability: 102.45

Today's strike rate: 12 wins from 13 selections = 92.31%
Strike rate since start: 172 wins from 190 selections = 90.53%

Projections for 27/09/2010
Strike rate: 4484 wins from 4954 selections = 90.51%
Profit: £948,038.95

Day 13 results - This time next year, I'll be a millionaire!

Wouldn't that be nice. :)

Today's starting bank: 2434.69
Today's profit: 105.15
Profit since 28/09/2009: 539.84
New bank: 2539.84
New stake liability: 101.59

Today's strike rate: 20 wins from 22 selections = 90.91%
Strike rate since start: 160 wins from 177 selections = 90.4%

Projections for 27/09/2010
Strike rate: 4492 wins from 4970 selections = 90.38%
Profit: £1,181,821.53

Day 12 results

Today's starting bank: 2332.93
Today's profit: 101.76
Profit since 28/09/2009: 434.69
New bank: 2434.69
New stake liability: 97.53 (unchanged)

Today's strike rate: 18 wins from 19 selections = 94.74%
Strike rate since start: 140 wins from 155 selections = 90.32%

Projected strike rate at 27/09/2010: 4259 wins from 4715 selections: 90.33%
Projected profit at 27/09/2010: £595,062.80

I'd settle for that too, but it would require me to lay horses for as much as £23,000 each.

Is this complete nonsense or is there a measure of reality to it, I wonder?

Thursday's results

Today's starting bank: 2438.17
Today's profit: -105.24
Profit since 28/09/2009: 332.93
New bank: 2332.93
New stake liability: 97.53 (unchanged)

Today's strike rate: 17 wins from 20 selections = 85%
Strike rate since start: 122 wins from 136 selections = 89.71%

As a bit of fun, I plan to add a new item to my daily report; a figure representing the projected year's profit. This will be calculated from the results and prices of bets placed to date, but repeated to simulate 365 days. In the early days, this will be very inaccurate as a prediction, but it will gain accuracy over time as the proportion that is factual increases.

Projected strike rate at 27/09/2010: 4049 wins from 4513 selections: 89.72%
Projected profit at 27/09/2010: £229,648.80

I'd settle for that!!!

Wednesday's results

Today's starting bank: 2269.54
Today's profit: 168.63
Profit since 28/09/2009: 438.17
New bank: 2438.17
New stake liability: 97.53

Today's strike rate: 20 wins from 21 selections = 95.24%
Strike rate since start: 105 wins from 116 selections = 90.52%

Now that I've layed over 100 horses, I thought I'd compare my results with Maria's at the same stage. At this point, Maria's strike rate was 81.65%, and she was £207.21 in profit. We'll see how we compare after 200...

I should mention though that Maria deducted 5% commission from her wins, while I am deducting my true commission rate which is a bit lower. Also she layed to a maximum price of 11 (10/1), so naturally her strike rate should be lower than mine.

Tuesday's results

Today's starting bank: 2177.42
Today's profit: 92.12
Profit since 28/09/2009: 269.54
New bank: 2269.54
New stake liability: 94.22 (unchanged)

Today's strike rate: 9 wins from 9 selections = 100%
Strike rate since start: 85 wins from 95 selections = 89.47%

Monday's results

Today's starting bank: 2165.07
Today's profit: 12.35
Profit since 28/09/2009: 177.42
New bank: 2177.42
New stake liability: 94.22 (unchanged)

Today's strike rate: 9 wins from 10 selections = 90%
Strike rate since start: 76 wins from 86 selections = 88.37%

Sunday's results

Still problems with the trading software. Very disappointing! I work in IT, and if a major system was down for almost a week, heads would roll.

Here's today's results on my laying system

Today's starting bank: 2355.51
Today's profit: -190.44
Profit since 28/09/2009: 165.07
New bank: 2165.07
New stake liability: 94.22 (unchanged)

Today's strike rate: 11 wins from 15 selections = 73.33%
Strike rate since start: 67 wins from 76 selections = 88.16%

A bad day, but I'm sure there will be worse to come.

I'm holding fire on place laying just now. I plan to get more data to analyse this.

Saturday's results

I had been looking forward to some trading this weekend, indeed I was hoping for the same on Tuesday and Wednesday because I'd taken time off work for that purpose. Unfortunately, the software I use, Bettrader, has been having problems that have kicked that plan into touch.

I'm still continuing with my laying system though, and here's today's results.

Today's starting bank: 2120.26
Today's profit: 235.25
Profit since 28/09/2009: 355.51
New bank: 2355.51
New stake liability: 94.22

Today's strike rate: 24 wins from 26 selections = 92.31%
Strike rate since start: 56 wins from 61 selections = 91.8%

I have very significantly increased the number of horses to lay without (hopefully) reducing the profitability of the system.

There were a few successful short priced lays today, and today's two winners both won by just a head. I know it's early days, but I think this could go very well. However, there will be losing days and maybe even the odd losing month ahead!

I did some more analysis of place laying these horses and am still unsure about the best way forward.

Friday's results

Today's starting bank: 2076.67
Today's profit: 43.59
Profit since 28/09/2009: 120.26
New bank: 2120.26
New stake liability: 84.81

Today's strike rate: 5 wins from 5 selections = 100%
Strike rate since start: 32 wins from 35 selections = 91.43%


Other factors that would help towards a profitable laying system are:

Maximise the number of horses to lay
Maria's system produced 4131 selections in that year. At the moment, mine produces roughly half that amount. I would be delighted to be able to increase my number of lays, obviously without introducing so may winners to make the system less profitable. I'm going to have a look.

Avoid backfitting
It is possible to add to your historical strike rate by using filters. That's all well and good if the reasons for those filters aren't just random. They have to be logical. For example, if I exclude horses with names beginning with the letter 'A', the strike rate may increase, but unless I can see why there is good reason for it, it's unlikely to increase my profits. Although it might reduce my losses!

Puzzled by the maths

I've been looking over my figures, and I'm wondering if they do in fact give me an edge at all!

I said that there's an 87% strike rate with these horses, and that the average price is 8.63, and that winners' prices average 6.42. By my arithmetic, that means that the losers' average price is 8.96.

If I lay 100 horses each to a liability of £100, I expect 87 to lose. I calculate this to provide profit of (100 / (8.96 - 1)) x 87 = 1092.96 less commission, say £1038.32. The 13 winners would cost me £1300. That's a net loss of £261.68. Not much of an edge?!

So why did I think it was? Need to check all my figures again, or maybe I'm missing something.

On a possibly more positive note, I checked back the last five years data, and the strike rate is consistently between 87% and 90%. I used an Industry SP of 12.0 (11/1) as the maximum price, because that was roughly what the average 16.0 BSP equates to.

Also, and this will need checking too, it's possible that these horses are worth laying to place as well. By adding a second laying system, it would help with another area that would increase my edge (if there is one).

Have a low commission rate
The profits I quoted for Maria's Laying System are probably underestimated by a fair bit. She deducted 5% from her profits even though she was probably on a rate of 2% commission. The difference could turn a losing system into a profitable one.

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I've sussed why the figures don't tally. Average prices can't be used in that way.
Pheww!

Thursday's results

Thurday 1 October
Starting bank: 2072.63
Today's profit: 4.04
Profit since 28/09/2009: 76.67
New bank: 2076.67

Today's strike rate: 8 wins from 9 selections = 88.89%
Strike rate since start: 27 wins from 30 selections = 90%


The system was inspired by Maria's Laying System.

http://www.expertbettingadvice.co.uk/forum/thread18432.html

Maria began with a £3000 bank, and in a year turned it into more than £100,000. Along similar lines, I'd like to increase my bank from £2000 significantly.

To do this, I need to be successful in a number of areas

Have an edge
I have to select horses that on average, win fewer races than their prices reflect they should. I am using a predetermined formula for this. Data I've collected suggests that the formula would have had an edge over the past 13 months. I used Betfair's SP in the calculations. I lay at a maximum BSP of 16.0 (15/1). The strike rate for those horses was 87%. The average BSP was 8.63. For the winners, the average was 6.42. I realise though that past performance is no guarantee of future profits.

Have a good staking plan
Since day 2, I've risked a liability of 4% of my current bank on each horse. Today that was £82.91. Tomorrow it increases to £83.07. However, after a losing day, I won't be decreasing the liability. Similar to Maria's staking plan, I will adjust my stakes downwards if my bank falls 25% below it's highest level, or reconsider whether it's worth continuing with. Using this method of staking against last year's data provided optimum profitability.

Lay at good prices
Ideally I'd like to lay below BSP. That's not going to be easy for me since I'm working all day. However, I can make use of Betfair's options for handling unmatched bets at the off. I'm a programmer, so I could also create a bot to place the bets if I feel that would be beneficial. It looks like it will, even if just to save time calculating the stakes and placing the bets.

Avoid mistakes
On Monday, there was a horse that fitted the system requirements, but its odds were too high, so I left it out. It was only after the race that I noticed that its price had dropped well below the limit.

Be patient and disciplined
That's not going to be easy for me either! Lets see how it goes.