Mechanism
Every extra indicator adds degrees of freedom. Degrees of freedom make it easier to rationalize any outcome.
Complexity also increases conflict: more signals disagree, so entries become late and exits become emotional.
Simple doesn’t mean naive. Simple means falsifiable and executable.
Practical framing: the market is a feedback system. Your job is to remove the behaviors that produce the same loss pattern, not to “feel better” about it.
- Turn recurring mistakes into hard gates.
- Reduce degrees of freedom when you’re losing.
- Make the next decision simpler than the last.
How it kills accounts
Add filters → signals conflict → fewer clean trades → late entries → churn → ‘needs tuning’ → endless tuning → death by attrition.
How it kills accounts:
- The rule exists only in your head.
- Stress arrives and you improvise.
- Improvisation becomes inconsistency.
- Inconsistency becomes random results.
- Random results become a slow bleed.
Rule that survives
If you can’t state what makes the strategy win and lose, it’s not ready.
Prefer few variables with clear roles.
Complexity must earn its keep with out-of-sample robustness.
Rule that survives:
- Write the trigger in observable terms.
- Write the action in one sentence.
- Write the penalty for breaking it.
Example archetype
You add indicators until you feel ‘safe’. Then you can’t trade because nothing aligns. When you finally do, it’s late. Complexity didn’t reduce risk; it reduced clarity.
Tell: if your rule isn’t enforceable, it’s a suggestion. Suggestions don’t survive stress.
Deep dive
Falsifiability is power
A strategy you can’t falsify is a strategy you can’t improve. The point of rules is to be testable, not impressive.
Related: Data is not neutral.
Glossary: overfitting.
Field checklist
- Write the rule in observable terms: if X, then Y.
- Remove choices under stress. Choices become rationalizations.
- Track the precursor: what state were you in before the mistake?
- Make deviations costly (size down, pause, review).
- Turn lessons into gates, not notes.