Mechanism
Traders enter on one thesis (breakout), then the market disagrees, and they silently switch thesis (mean reversion), then switch again (“long-term hold”).
This drift destroys risk management because the stop, timeframe, and size rules change without acknowledgement.
The market doesn’t care about your labels. Your risk does.
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
Trade goes against you → thesis changes → stop removed/moved → size increases → time horizon expands → eventual forced exit.
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
Label the trade type at entry and define its invalidation.
If the thesis changes, exit or resize; don’t “morph”.
Track how often you change thesis mid-trade.
Rule that survives:
- Write the trigger in observable terms.
- Write the action in one sentence.
- Write the penalty for breaking it.
Example archetype
You buy a breakout. It fails. You call it a ‘pullback entry’. It fails again. You call it a ‘long-term investment’. That’s not conviction. That’s drift.
Tell: if your rule isn’t enforceable, it’s a suggestion. Suggestions don’t survive stress.
Deep dive
Identity changes are risk changes
When the thesis changes, the risk model must change. Most traders change the thesis but keep the size. That’s how accounts break.
Related: Hedging is often just denial.
Glossary: time stop.
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.