The Math Behind Good Trades
Professional traders don't just look at charts. They evaluate every trade as a math problem: What's my potential gain vs. my potential loss? If I'm right 40% of the time, do I still make money?
This is risk-to-reward ratio (R:R), and it's especially critical with leverage because the stakes are amplified.
What Is Risk-to-Reward?
R:R = Potential Profit / Potential Loss
If you risk $100 to potentially make $300, your R:R is 3:1. A 2:1 R:R means you make twice what you risk.
Why R:R Matters More With Leverage
With leverage, your loss on a losing trade is amplified. A 1:1 R:R with 10x leverage means a small adverse move costs you heavily. You need higher R:R ratios to compensate.
| R:R RATIO | BREAKEVEN WIN RATE | VERDICT |
|---|---|---|
| 1:1 | 50% | Marginal |
| 2:1 | 33% | Good |
| 3:1 | 25% | Excellent |
| 5:1 | 17% | Ideal |
A 3:1 R:R means you only need to be right 25% of the time to break even. Most traders aim for 2:1 minimum.
Calculating R:R for a Futures Trade
Let's say you're going long BTC at $65,000:
- Stop-loss at $64,000 (risk: $1,000 per BTC)
- Take-profit at $68,000 (reward: $3,000 per BTC)
- R:R = $3,000 / $1,000 = 3:1
With 10x leverage and $100 margin, you control $1,000 notional:
- If stopped out: lose $100 × (1000/65000) = -$15.38
- If take-profit hit: gain $100 × (3000/65000) = +$46.15
Expected Value (EV)
Expected value tells you if a trade is profitable over many repetitions:
EV = (Win Rate × Avg Win) - (Loss Rate × Avg Loss)
If your win rate is 40% and R:R is 3:1:
EV = (0.40 × $300) - (0.60 × $100) = $120 - $60 = +$60
That's +$60 expected per trade. Even losing more often than winning, you profit because your winners are 3x bigger than your losers.
Rules for Futures R:R
- Minimum R:R of 2:1 for any leveraged trade
- 3:1 or better for trades above 10x leverage
- Never enter a 1:1 trade with leverage — fees + slippage + funding will make it negative EV
- Calculate BEFORE entering: Where is my stop? Where is my target? What's the R:R?
Key Takeaways
- Risk-to-reward is the foundation of profitable trading
- A 3:1 R:R means you can be wrong 75% of the time and still break even
- Higher leverage demands higher R:R ratios
- Expected value tells you if a strategy is profitable over time
- Never enter a leveraged trade without calculating R:R first