to all of the above -
An excellent quote from Yannis:
For me, breaking a rule that I have agreed to or established myself, is a sign that I don't trust it yet. It may be my fault and the solution may be better discipline, or it may be the rule's fault and it should be changed.
Therefore, the only thing that I have found to work in these circumstances, is backtest and/or papertrade the rule some more. Then, I either accept it deeper down and that helps my discipline - or develop a better argument how/why the rule should be changed or abolished.
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Best Wishes,
Paul