Danger-to-Reward in Foreign exchange: Why Fastened Ratios Fail
The maths appears good — till the market disagrees.
The Promise of the Excellent Ratio
If you happen to’ve learn any buying and selling e-book or watched a YouTube guru, you’ve heard it:
“All the time goal for a 1:2 or 1:3 risk-to-reward ratio.”
It sounds bulletproof. Danger 1 to make 2 or 3? Simple math.
However right here’s the issue: the market doesn’t care about your ratio.
I’ve seen numerous merchants drive this rule into their EAs — and find yourself with techniques that look wonderful on paper however collapse in dwell buying and selling.
Why Fastened Ratios Break in Actual Circumstances
1. Market Construction Is Not Symmetrical
Value hardly ever strikes in neat multiples of your cease loss. Forcing a set goal typically means you exit too late or too early.
2. Greater Targets Scale back Win Fee
In case your TP is 3x your SL, you’ll win much less typically. That’s wonderful for some methods — however lethal for others.
3. Fastened R:R Ignores Volatility
A 20-pip SL means very various things in a relaxed Asian session vs a risky NY open.
4. It Creates Emotional Strain
Longer time in trades = extra stress, extra temptation to shut early.
The Hidden Hero: Expectancy
As an alternative of obsessing over the ratio, concentrate on expectancy:
Expectancy = (Win% × Avg Win) − (Loss% × Avg Loss)
An EA with 90% win price and a 0.7:1 R:R can simply outperform one with 40% win price and three:1 R:R — if the maths works out.
A Actual Instance from Our Low-Drawdown EA
- Win price: ~92%
- Common R:R: 0.6:1
- Dwell DD: 6–8%
- Month-to-month progress: Constant single digits, compounding steadily
Most merchants would reject that R:R immediately — till they see the fairness curve.
How you can Suppose About R:R for EAs
✅ Adapt Targets to Market Circumstances
Let volatility, not mounted numbers, determine your TP.
✅ Prioritize Stability Over “Huge Wins”
A gradual curve beats a rollercoaster, particularly for funded accounts.
✅ Take a look at A number of R:R Situations
Don’t simply take a look at 1:2. Attempt dynamic trailing stops, partial closes, or ATR-based targets.
✅ Match R:R to Technique Logic
Imply-reversion methods work higher with smaller targets. Development-following can go larger — in case you can deal with decrease win charges.
Why This Issues for You
If you happen to’re chasing a set ratio as a result of “that’s what execs do,” you is likely to be sabotaging a wonderfully good EA.
As an alternative, design or select bots primarily based on sturdy expectancy — the sort that survives in actual markets.
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