is this a good system?

[GoodGuy]

i wanted to ask the professionals about a system that has the following attributes and whether the race pool is big enough. Totals

	Bets	Wins	Win Strike Rate	Win %Return at SP	Placed (inc wins)	Place Strike Rate	Each-Way %Return at SP
All Selections	206	112	54.4%	130.5%	152	73.8%	118.2%

Results broken down by Year

	Bets	Wins	Win Strike Rate	Win %Return at SP	Placed (inc wins)	Place Strike Rate	Each-Way %Return at SP
2004	46	29	63.0%	152.3%	38	82.6%	138.0%
2005	48	22	45.8%	110.3%	29	60.4%	96.3%
2006	44	23	52.3%	125.4%	34	77.3%	120.8%
2007	35	22	62.9%	150.3%	29	82.9%	133.0%
2008	33	16	48.5%	115.1%	22	66.7%	103.1%

[Trojan]

Re: is this a good system? I'm not a professional, but my experience with devising systems suggests that you have not nearly enough data to have confidence in this one. You really need to see well over 500 events in my opinion for a backing system, even though your strike rate is quite high. The other key thing is how many filters have been applied to get the results? The fewer there are, the more likely the performance will be replicated going forward. What you're looking for is something fundamental that points to an inefficiency in the market, and if you can explain WHY it leads to a betting advantage, there's more chance of it being a truly valid system. Good luck anyway!