If you implement only one rule from this academy, make it this one: a written, hard daily-loss limit. It is the single highest-impact discipline rule for retail traders.
Why it matters more than strategy
Most retail traders are not killed by their best trades. They are killed by the worst three days of any given quarter. A daily-loss limit caps the damage on those days.
How to set the number
Common defaults: 2R or 3R, where R is your per-trade risk. On a 1% per-trade risk, that is a 2–3% daily-loss cap. Some traders use 5R for swing styles. Pick a number you can defend in advance and write it down.
How to enforce it
- Hit the cap → close the platform.
- No new trades that day. Nothing.
- Don't check charts.
- Journal what triggered the day, but only after the emotion has cooled.
Why traders ignore it
"I'm close to making it back." That sentence is the start of every catastrophic day in retail trading. The cap exists specifically because in the moment, you will not enforce it on yourself. Enforce it as a rule, in advance, in writing.
Next steps on ShaFX
- Free trading calculators — position size, pip value, margin, risk/reward, drawdown.
- Take a quiz on this topic and see what you missed.
- Glossary — precise definitions for every term used here.
- Compare brokers using our methodology.