No restrictions.

7 days a week.

Try not to use form judgement because that's when they tend to get up with horrible form lines & huge prices, you will say to yourself that there is no way in a million years I would have picked that.

The longest theoretical run of outs, at 20%, is 31 ,before the next winner is struck.
We are treating the 2 horses a race, as 1 bet which means that 31 races max losing run .

You can include NZ races as well. (optional).

If you wish to experiment with field sizes you might like to have a free play around with an interactive form analysis program called...
Online System Creator (Google)
e.g.
10 runners exactly
Between Barriers 9 & 10

You should have hours of fun experimenting with angles that may show a profit.

__________________
Cheers.