"Always use at least a 1:2 risk-reward ratio" is one of the most repeated pieces of trading advice — and also one of the most frequently applied without understanding the actual math that makes it useful. The ratio itself means nothing in isolation; what matters is the win rate it requires to be profitable.
What the ratio actually measures
Risk-reward ratio compares how much you stand to lose against how much you stand to gain on a single trade. If your stop loss is 20 pips away and your take-profit target is 40 pips away, that's a 1:2 ratio — you're risking $1 to make $2. A 60-pip target against the same 20-pip stop would be 1:3.
The win rate math that actually matters
Here's the part that gets skipped: every risk-reward ratio implies a specific break-even win rate — the percentage of trades you need to win just to not lose money, before any edge at all.
- 1:1 ratio — requires roughly a 50% win rate to break even
- 1:2 ratio — requires roughly a 33-34% win rate to break even
- 1:3 ratio — requires roughly a 25% win rate to break even
This is the entire reason a 1:2-or-better ratio gets recommended so often: it gives you a wide margin for error. You can be wrong nearly two-thirds of the time and still come out ahead. A trader with a 40% win rate and a 1:2 ratio is solidly profitable; a trader with a 60% win rate and a 1:1 ratio is only marginally so, and a single bad losing streak can wipe out weeks of gains.
Worked example
Take 100 trades at a 1:2 ratio with a 40% win rate: 40 wins × 2R and 60 losses × 1R = 80R gained, 60R lost, for a net of +20R. Now take the same 100 trades at 1:1 with a 60% win rate: 60 wins × 1R and 40 losses × 1R = 60R gained, 40R lost, for a net of +20R. Identical outcome — but the 1:2 trader can tolerate a far worse run of luck before it actually costs them money.
Why a high ratio doesn't fix a bad entry
This is the part the "always use 1:2" crowd tends to leave out: risk-reward ratio only describes where your stop and target sit relative to each other — it says nothing about whether price is actually likely to reach that target. Placing an arbitrary take-profit far away to manufacture a "good" ratio, with no regard for actual chart structure, support, resistance, or volatility, doesn't create an edge. It just makes a bad entry feel more justified on paper, right up until the trade doesn't work.
A good target is one set at a real structural level — the next resistance zone, a prior swing high, a measured move — where there's a genuine reason price might reverse or stall. The ratio should be a result of that analysis, not the starting point.
Checking your ratio before every trade
PipDesk's Risk-to-Reward Calculator takes your entry, stop, and target and instantly returns the ratio and the win rate you'd need to break even at that ratio — useful for catching a marginal setup before you're in it, not after. Once you're in the trade, log it in the Trading Journal so you can see your actual realized win rate against your actual realized ratio over time, rather than guessing.
Key takeaways
- Every risk-reward ratio implies a specific break-even win rate — know it before you place the trade.
- A 1:2 ratio only needs a ~34% win rate to break even, which is why it's a common minimum target.
- The ratio should come from real chart structure, not from working backwards to make the math look good.
For the formal definition and more worked examples, see Babypips' Forexpedia entry on risk-reward ratio.