From Dr. Brett's blog post yesterday, I found this link to his April 19th, 2008 thoughts:
"* I mentioned in my book an important law of performance: In every performance field of note--from Olympic athletics to Broadway--performers spend more time in practice than in formal performance. That is how expertise develops. The ratio of "practice" time (time spent on markets outside of trading) to trading time is a worthwhile indicator of a trader's prospective success."
