COURSE 2 · RISK MANAGEMENT · LESSON 5
Risk-Reward Ratio Explained: The Win Rate You Actually Need
The risk-reward ratio is the one risk tool that is pure arithmetic. Understand it and you can tell in seconds whether a trade is even worth taking.
Updated 2026-09-04 · Educational content · No broker owns this site
Quick answer. The risk-reward ratio compares what a trade can lose to what it can make: risking 1 to make 2 is 1:2. It sets the win rate you need to break even — 1:2 needs 33%, 1:3 needs 25% — which is pure arithmetic, not a promised outcome.
What is the risk-reward ratio?
The risk-reward ratio compares two distances on the same trade: how far price has to move against you to hit your stop-loss, and how far it has to move in your favour to reach your target. If you risk 20 pips to make 40, that is a ratio of 1 : 2 — one unit of risk for two units of reward.
The cleanest way to think about it is in R units. Your stop distance is 1R: one unit of risk, whatever dollar amount that works out to for your account. Every target is then just a multiple of that same distance — 1R, 2R, 3R. Measuring trades this way lets you compare a EUR/USD trade with a GBP/JPY trade even though the pip values differ, because both are expressed in units of their own risk.
Notice what the ratio does not tell you: how likely the trade is to work, or how big your position should be. Position size is a separate calculation driven by the stop distance (covered in the position-sizing lesson). The ratio only describes the shape of the payoff — what you stand to lose versus what you stand to make.
What win rate do you need to break even?
This is where the ratio earns its keep, and it is the one part of the whole topic that is not opinion. For any risk-reward ratio, the win rate you need just to break even is fixed arithmetic:
Break-even win rate = 1 ÷ (1 + reward per unit of risk). A 1 : 2 trade needs 1 ÷ (1 + 2) = 33%. A 1 : 3 trade needs 25%. Nothing about the market changes these numbers — they are true the way 2 + 2 = 4 is true.
| Risk-reward (risk : reward) | Reward per 1 risk | Win rate to break even | Loss rate you can absorb |
|---|---|---|---|
| 1 : 1 | 1.0 | 50% | 50% |
| 1 : 1.5 | 1.5 | 40% | 60% |
| 1 : 2 | 2.0 | 33% | 67% |
| 1 : 3 | 3.0 | 25% | 75% |
| 1 : 5 | 5.0 | 17% | 83% |
| 1 : 10 | 10.0 | 9% | 91% |
Read the table the honest way round. It does not say a 1 : 3 trade wins 25% of the time — your actual win rate depends entirely on your strategy and the market. It says that if you take 1 : 3 trades, you can be wrong three times out of four and still not go backwards. A higher ratio buys you a lower break-even bar; whether you clear that bar is a different question, answered in the win-rate section below.
One real-world caveat the arithmetic leaves out: the spread and any commission are paid on every trade, so your practical break-even win rate is always a little higher than the table shows — more so for tight stops, where costs are a bigger share of the move.
How do you calculate risk-reward on a real trade?
You need three prices, decided in this order: entry, stop, then target. The ratio falls out of the two distances.
| Step | Value | Where it comes from |
|---|---|---|
| Entry price (EUR/USD) | 1.0850 | Your planned entry zone |
| Stop-loss | 1.0830 (20 pips away) | Below the structure that proves the idea wrong — this is 1R |
| Target | 1.0890 (40 pips away) | The next level price can realistically reach |
| Risk-reward | 40 ÷ 20 = 1 : 2 | Reward distance divided by risk distance |
| Break-even win rate | 33% | 1 ÷ (1 + 2) — arithmetic only |
Here the reward distance (40 pips) is twice the risk distance (20 pips), so the trade is 1 : 2 and its break-even win rate is 33%. If the same setup only offered a target 20 pips away — a 1 : 1 trade — you would need to win half your trades just to stay flat, which is a much harder standard to hold over time. If you cannot find a target that is at least a small multiple of your risk, that is usually a sign to skip the trade rather than shrink the target.
Why is the ratio decided before you enter, not after?
The order matters. A sound trade fixes the stop first — at the price that proves the idea wrong — then measures the realistic target, and only then checks whether the resulting ratio is worth taking. The ratio is a filter: if the reward does not justify the risk, you do not take the trade.
The failure mode is doing it backwards: entering first, then moving the stop closer or the target further away to make the ratio look acceptable on screen. A stop placed to flatter the ratio instead of to invalidate the idea is no longer protecting anything — it just gets hit by normal noise. Decide the numbers before the money is on the line, when you can still walk away.
A useful test from experienced traders: before entering, ask whether the reward on offer would justify the effort and the risk. A setup that only pays a slim multiple of what it risks can be skipped the same way you would pass on buying something at 8 to sell it at 10 — technically a profit, rarely worth the work and the exposure.
How do partial profits change your effective risk-reward?
Many traders do not aim for a single target. Instead they scale out: close part of the position once price has moved a set multiple of the risk, then let the rest run. A common rule is to take half the position off at 1 : 2, which banks roughly the amount originally risked — so even if the remaining half is later stopped at break-even, the trade still finishes positive.
Be clear-eyed about the trade-off. Scaling out lowers the swings in your results (a smoother equity curve), but it also lowers the average size of your winners — you are trading some upside for consistency. It is not free, and it is not automatically better; it is a deliberate choice about variance.
Two schools, pick one deliberately. One approach trims at a pre-set level such as 1 : 2 — mechanical, easy to follow, easy to review afterwards. Another refuses a fixed target and instead exits when momentum or structure says the move is done — more flexible, but it needs chart-reading skill you may not have yet. For a beginner the mechanical rule is far easier to apply consistently, and consistency is where the benefit of scaling out actually comes from.
Is a bigger risk-reward ratio always better?
No — and this is the mistake that quietly costs beginners money. Risk-reward means nothing on its own; it only matters next to how often you win. The two multiply together into expectancy, the average result per trade. A great ratio with a win rate below its break-even line still loses money.
There is also a natural tension: aiming for a very high ratio usually means a more distant target, which price reaches less often, so your win rate falls as your ratio rises. Chasing 1 : 10 on every trade is not discipline, it is greed — you will win so rarely that the account bleeds while you wait. The workable range for most people sits at modest ratios like 1 : 2 or 1 : 3 with a win rate that comfortably clears the break-even bar, not at heroic ratios you almost never hit.
Treat any promised ratio with suspicion. When a course or signal service advertises “1 : 5 setups”, that is a target they designed, not a measured result — it tells you nothing about how often those setups actually reach the target. A ratio only becomes real profit once you know the win rate that goes with it.
Where this fits in the risk course
This is part of the Risk Management course. If you have not yet decided how much of your account each 1R should cost, start with risk per trade. The position-sizing lesson that turns your ratio and stop distance into a lot size, and the full Risk Management hub, are coming soon.
Related lessons and tools
- How much to risk per trade — decide the 1% before you decide the ratio.
- Position size calculator — turn the stop distance into a lot size.
- Pip — the unit every example above is measured in.
Frequently asked questions
What is a good risk-reward ratio in forex?
There is no single right number, but many traders treat about 1 : 2 as a sensible floor, because it only needs a 33% win rate to break even. What actually makes a ratio “good” is that your real win rate clears its break-even line with room to spare — a 1 : 3 trade you win 20% of the time still loses money.
Does a 1 : 2 risk-reward ratio guarantee profit?
No. A 1 : 2 ratio only means you break even at a 33% win rate; it says nothing about whether your strategy actually wins that often. Profit comes from win rate and ratio together (expectancy), not from the ratio alone, and no ratio can promise a result.
How is risk-reward ratio related to win rate?
They are the two halves of expectancy. The ratio sets the win rate you need to break even — 1 ÷ (1 + reward). Raising the ratio lowers that break-even bar but usually lowers your actual win rate too, because a further target is reached less often. You need both numbers to judge a strategy.
Should I set a fixed take-profit or manage the exit live?
Both are used. A fixed target (for example, close at 1 : 2) is mechanical, easy to follow and easy to review — which suits beginners. Managing the exit by reading momentum or structure can capture bigger moves but needs skill you may not have yet. Whichever you choose, decide it before you enter, not while the trade is open.
Is risk-reward the same as position size?
No. Risk-reward is the shape of one trade’s payoff (risk distance versus reward distance). Position size is how many lots you trade so that hitting the stop costs a fixed, small share of your account. You set the ratio first, then size the position from the stop distance.
Sources
- Break-even win rate = 1 ÷ (1 + reward). This is arithmetic and can be checked on any calculator.
- FirstPip knowledge base — risk-reward and partial profits; win rate vs expectancy (internal notes distilled from trader-education sources; framework claims presented as such, not as measured outcomes).
- BabyPips Forexpedia — Reward-To-Risk Ratio (RRR), định nghĩa & cách tính (kiểm tra 2026-09-04)