A pyramid circulates among traders that splits the causes of success: about half psychology and discipline, a third risk management, and the rest strategy.
A warning before you use any of this
These percentages are not measured. No study produces "50% psychology" as a statistical result, and any number of this kind is a figure of speech for ranking priorities, not a measurement of them. We show it here as a way of thinking. Presenting it as a hard number would break the rule we apply to ourselves: no number without a source and a sample size.
What is right about the idea
What is true is that the marginal return on improving the strategy shrinks quickly, while the marginal return on improving execution stays high. Two traders with the same method end up with different results because one kept to position size and stop and the other didn't. That is why a "good setup" alone isn't enough.
What is wrong with taking it literally
This should not be read as an excuse to neglect the method. A strategy with negative expectancy can't be saved by iron discipline; discipline only lets you execute the expected loss more precisely. The right order: first check that the method has positive expectancy over a large enough sample, then let discipline protect it.
How to make it actionable
Turn discipline from an intention into something you can measure. In your trade journal, answer three yes/no questions for every trade: did it have a defined stop before entry? Did you respect your risk size? Did you exit by the rule, not by feel? Your "yes" rate over fifty trades is a real number about you, unlike any generic pyramid.
