Risk-to-Reward Ratios: How to Pick One That Actually Works

A risk-to-reward ratio only works if your win rate can support it. This article shows the breakeven math for common ratios and how to check yours against your own trading history.

A risk to reward ratio forex traders often quote as a rule of thumb — 1:2, 1:3, "never go below 1:1" — is really just a shorthand for one question: how much are you willing to lose to make how much? On its own, the ratio tells you nothing about whether a trade is any good. It only becomes useful once you pair it with the one number most traders never calculate: the win rate that ratio actually requires to break even.

This is where a lot of stop loss and take profit placement goes wrong. Traders pick 1:2 because it sounds sensible, then wonder why a strategy that wins 40% of the time is still bleeding money. The ratio and the win rate are two halves of the same equation. Get the maths right and you can check any target you're using against your own trading history in under a minute.

This article walks through that calculation, shows you how to match a ratio to your actual results, and explains why chasing a bigger reward isn't automatically the answer.

What a Risk-to-Reward Ratio Actually Measures

A risk-to-reward ratio compares the distance from your entry to your stop loss (what you're risking) against the distance from your entry to your take profit (what you stand to gain). A 1:2 ratio means your take profit is twice as far from entry as your stop loss. Risk £50 to make £100, risk 20 pips to target 40, risk $2 on gold to target $4 — the ratio is the same regardless of the instrument or account size, because it's a relationship between two distances, not a fixed amount of money.

It says nothing about probability. A 1:5 ratio looks impressive on paper, but if the trade only wins one time in ten, it's a loser overall. A 1:1 ratio looks unambitious, but if it wins six times in ten, it's solidly profitable. The ratio is half the picture. Win rate is the other half, and the two only mean something when you put them together.

The Maths: Working Out Your Breakeven Win Rate

The breakeven win rate is the minimum percentage of trades you need to win, at a given risk-to-reward ratio, just to come out flat — before spread, commission, or slippage. The formula is:

Breakeven win rate = 1 ÷ (1 + R)

where R is your reward divided by your risk (so a 1:2 ratio has R = 2, a 1:3 ratio has R = 3, and so on).

Here's what that looks like across common ratios:

Work through 1:2 as an example. R = 2, so breakeven win rate = 1 ÷ (1+2) = 1 ÷ 3 = 33.3%. That means if you risk £50 to make £100 on every trade, you only need to win one trade in three to break even. Win more than a third of your trades at that ratio and you're profitable, before costs.

That last point matters. This is the mathematical breakeven, not the real one. Spread, commission and slippage all eat into the reward side or add to the risk side of every trade, so your actual required win rate sits a little above the number in the table. How much above depends on your broker's costs relative to your typical stop distance — a 20-pip stop with a 1.5-pip spread is affected far more than a 200-pip stop with the same spread. Build in a buffer rather than treating the theoretical figure as your target.

You don't need special software to do any of this — it's arithmetic you can run on a phone, though a basic risk reward ratio calculator (a spreadsheet with the formula above works fine) saves you redoing it every time you tweak a stop distance.

Matching the Ratio to Your Strategy's Real Win Rate

The breakeven formula only becomes useful once you compare it to your own trading win rate percentage — not the win rate you assume you have, the one your actual trade history or backtest shows.

Pull the last 50 to 100 trades from a strategy (more if you can — small samples swing around a lot) and calculate two things:

• Your actual win rate: winning trades ÷ total trades.
• Your average realised risk-to-reward: average winning trade size ÷ average losing trade size.

Then check your win rate against the breakeven figure for the ratio you've been using. If your strategy wins 45% of trades but you've been setting 1:3 targets (which need 25% to break even), you have room — you could tighten stops or trail more aggressively without hurting profitability, because your win rate has slack built in. If your strategy wins 30% of trades and you're using 1:2 targets that need 33.3%, you're marginal, and small increases in cost or a rough patch will tip you into a loss.

This is the core of forex risk management that actually holds up under real trading conditions: the ratio and the win rate have to be checked against each other, using your numbers, not a number you read somewhere.

Setting Stop Loss and Take Profit Distances That Line Up

In practice, the stop loss take profit ratio should come from the chart, not the other way round. Decide where your stop needs to sit based on structure — beyond a swing low, outside a range, a sensible multiple of average true range — because that's the level at which your trade idea is actually wrong. Decide where your target sits based on where price is realistically likely to go — the next resistance level, a prior high, a measured move.

Once both distances are set, the ratio falls out of that as a result, not an input. If it comes out at 1:1.4, that's not a problem to fix by dragging the take profit further out — it's information. Check it against your win rate for that setup. If your win rate on this pattern comfortably clears 40% (the breakeven for that ratio), the trade is structurally sound as it stands. Only widen the target if there's a genuine technical reason for price to reach it — moving it purely to improve the ratio number on paper doesn't change anything about the market.

Why a Higher Ratio Isn't Automatically Better

Stretching your take profit further away doesn't just increase the potential reward — it also reduces the probability of getting there, because price has to travel further, retrace less, and avoid more obstacles along the way to hit it. Win rate and reward size tend to move in opposite directions for the same setup. A 1:1 target close to entry might hit 55% of the time; push the same trade idea's target out to 1:4 and the win rate might drop to 20%, because you're now asking price to survive more noise, more consolidation, and more chances to reverse before it prints.

That's why comparing ratios in isolation is misleading. A 1:4 strategy at a 20% win rate produces the same long-run result as a 1:1 strategy at 50% (both sit right at breakeven before costs) — the "better" ratio depends entirely on which one your strategy can actually deliver, consistently, over enough trades. There's also a psychological cost to very low win rates: strings of six or seven losses before a winner are statistically normal at 1:4 but can feel wrong emotionally, which is when traders abandon a system that was working, at exactly the wrong point in its cycle.

Trading always carries the risk of loss regardless of which ratio you choose, and no ratio or win rate combination removes that risk — it only describes the shape of it.

Frequently asked questions

What win rate do you need for a 1:2 risk reward ratio?

Mathematically, 33.3% wins the trades back to breakeven, calculated as 1 ÷ (1 + 2). In practice you'll want a few percentage points above that to absorb spread, commission and slippage, so treat anything comfortably above 35–38% as giving you genuine room to be profitable at that ratio.

How do you calculate breakeven win rate in forex trading?

Divide your reward by your risk to get R (a £100 target against a £50 stop gives R = 2), then apply breakeven win rate = 1 ÷ (1 + R). This gives you the theoretical minimum before trading costs; your real breakeven point will sit a little higher once spread and commission are accounted for.

Is a 1:3 risk reward ratio good for forex trading?

It's only good if your strategy can win more than 25% of its trades at that ratio, which is the breakeven point for 1:3. A high ratio with a win rate below that threshold still loses money over time, so the ratio's quality depends entirely on the win rate that produced it, not on the number itself.

How do you find the best risk reward ratio for your strategy?

Look at your existing trade history or backtest results, calculate your actual win rate, and work out which ratios you'd need to break even at that win rate using the formula above. The best ratio is usually whatever your chart structure naturally produces, provided your historical win rate for that setup clears the corresponding breakeven threshold with some margin.

Does a higher risk reward ratio always mean more profit?

No. Win rate typically falls as a target moves further from entry, since price has more distance and more obstacles to overcome, so a higher ratio often comes with a lower win rate that can leave the overall result unchanged or worse. What matters is the combination of the two, checked against real trade data, not the ratio in isolation.

Why do I keep losing money even though my risk reward ratio looks fine?

A ratio that looks fine on paper can still lose if your actual win rate sits below the breakeven threshold it requires, or if trading costs are eating a larger share of your risk than you've accounted for. Recalculate your win rate from a genuine sample of recent trades and compare it honestly against the breakeven figure for your ratio before assuming the setup itself is the problem.

Should I use the same risk reward ratio for every trade?

Not necessarily. Different setups within the same strategy can have different realistic win rates depending on market structure, so forcing every trade into one fixed ratio can mean over-targeting some setups and under-targeting others; it's more useful to let the stop and target come from the chart and then check each type of setup against its own win rate.

Where to go from here

Pull your last batch of trades, work out your real win rate, and run it against the breakeven formula for the ratio you've actually been trading. If the numbers don't line up, that's more useful information than any generic "use 1:2" rule — it tells you precisely whether your targets need adjusting, your stops need tightening, or your win rate needs work before the ratio will matter at all.