There's some stuff on here I've written about Chi-Square tests and sample sizes. You should find them with a search. Sorry don't have them at hand at present.

The bottom line is that the market is almost always going to be a better judge than you or me. From time to time variance is going to make us think we're on to a real winner but the market is very patient and knows its business.

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Pixie

"It's worth remembering that profit isn't profit until it's spent off the racecourse." -- Crash