Why Traders Struggle With Discipline

If there’s a single theme that dominates discussions of trading psychology, it’s discipline.
Traders are routinely encouraged to control their emotions, stick to their processes, keep journals, whatever.  If you lapse in your trading, it’s because you’re not sufficiently disciplined.  Call it the puritanical approach to trading: if you don’t stick to the straight and narrow, yours is a failure of willpower and commitment.
Research provides us with a different picture, however.
Willpower is a limited resource, tied to glucose levels in the

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