Mechanism
Risk per trade is a unit; it is not a cap. The cap is your daily and weekly loss tolerance.
On active days, trades cluster. Signals cluster. Correlations rise. Execution gets worse. If you take multiple attempts, you can stack losses faster than your psychology can adapt.
This is why many traders feel “unlucky” on volatile days: they’re not unlucky, they’re under-capped.
Risk note: most blowups are not one mistake, they are a stack. The first error is small. The second is emotional. The third is leverage.
- Define a max loss per day/week that forces a stop, not a “goal”.
- Keep a volatility buffer: size for the worst recent range, not the median.
- Assume correlation rises when you most need diversification.
How it kills accounts
Set 1R per trade → take many attempts → losses cluster → daily drawdown exceeds tolerance → emotional decisions → size changes → bigger losses → account damage.
How it kills accounts:
- Small loss triggers a “fix-it” trade.
- Exposure creeps up across correlated positions.
- A routine streak arrives.
- Drawdown forces behavior change (revenge sizing / avoidance).
- One tail event finishes the job.
Rule that survives
Set a daily max loss (hard stop) and a max number of attempts per setup.
Treat correlated trades as one bet when budgeting risk.
When daily volatility regime is abnormal, cut frequency before you cut discipline.
Rule that survives:
- Cap total heat (open risk), not just per-trade risk.
- After drawdown, reduce size automatically.
- Plan the gap: size as if stops can slip.
Example archetype
You risk 1R per trade and take 7 trades. Four lose quickly, two scratch, one wins small. You’re down 4R and now trading angry. The problem wasn’t the setup; it was the missing daily cap.
Tell: if you “need” this trade to work to recover, your size is too large.
Deep dive
Why this matters
Your account doesn’t experience “per trade”. It experiences sequences.
Related: Sequence risk beats your average and The one bad day problem.
Glossary: drawdown, sequence risk, risk creep.
Field checklist
- Define max heat (total open risk). You can’t manage what you don’t cap.
- Keep a free-margin buffer that survives a normal shock and a bad fill.
- Scale down after drawdown. Your job is to stop the bleed, not to win it back.
- Treat correlated positions as one position.
- Plan the gap: what happens if price jumps through your stop?