Risk-Reward Ratio vs Win Rate: The Math That Decides Profitability

Every trading video seems to have an opinion on risk-to-reward. “Never take less than 1:3.” “High win rate is all that matters.” Both camps are partly right, and both leave out the part that actually decides whether you make money.

Before we talk about ratios, though, we need to talk about risk itself. This is where trading turns into gambling for a lot of people: they pick a ratio without really understanding what they’re risking.

First, what is “risk” in a trade?

Risk is the amount you lose if the trade goes wrong and your stop is hit. Not the lot size. Not a percentage you vaguely have in mind. The actual dollar amount that leaves your account if you’re wrong.

A risk-to-reward ratio compares that amount with what you stand to gain. Risk $100 to make $300, and that’s 1:3. But a ratio on its own tells you nothing about whether the trade is sensible. A 1:3 trade risking 10% of your account is far more dangerous than a 1:1 trade risking 0.5%.

So every ratio needs three things alongside it:

1. The risk amount, as a percentage of your account
2. How often the setup wins
3. What you’ll do after a loss, including whether you’ll change your size

Miss any of those and you’re not using a ratio. You’re guessing. Our guide to how much to risk per trade covers the first one in detail.

Two traders, two very different approaches

Consider two traders using different styles.

Trader A trades 1:1. They risk $100 to make $100, take quick, high-probability setups, and win most of the time.

Trader B trades 1:5. They risk $100 to make $500, wait for bigger moves, and lose most of their trades.

Which one is right? Either can be profitable. It depends on the win rate each one actually achieves. Here’s the minimum win rate you need just to break even at different ratios, before costs:

With 1:5, you only need to win about one trade in six to break even. That’s why some traders love it: they don’t need a high win rate. With 1:1, you need to win more than half your trades, which is why those traders focus on high-probability setups.

Now look at what each one makes over 100 trades:

Trader B looks better on paper. But there’s a catch.

The part nobody mentions: losing streaks

With a 25% win rate, long losing streaks aren’t bad luck. They’re normal. The chance of losing 10 in a row on any given run of trades is about 6%, and over hundreds of trades a streak like that becomes very likely. Can you sit through 10, 12, or 15 losses in a row without changing your plan, doubting the strategy, or sizing up to “make it back”? Most people can’t.

Trader A rarely sees long streaks. Five losses in a row at a 60% win rate happens about 1% of the time. That’s much easier to live with emotionally, even if the long-run return is lower.

So the “best” ratio isn’t just a math question. It’s a question about your patience and your tolerance for losing. Our article on risk of ruin and drawdown recovery goes deeper into how streaks affect an account.

Should you double up after a loss?

It’s tempting. Lose $100, risk $200 on the next trade, and one win gets it all back. This is called a martingale approach, and it’s one of the fastest ways to destroy an account.

Here’s why. Start at 1% risk and double after each loss:

Six losses, which as we just saw is entirely possible, and most of the account is gone. Doubling up turns a normal losing streak into a disaster. Keep your risk per trade consistent, and decide in advance what you’ll do after a loss: usually, nothing different.

Why win rate is a misleading number

Honestly, win rate on its own isn’t that important. Here’s an example of why.

Imagine someone trading tiny positions with no stop loss at all. When a trade goes against them, they just wait. Weeks, sometimes months, until the market comes back and they can close it in profit. Their win rate might be close to 100%.

But look at what’s actually happening. Their money is tied up for months. One trade that never comes back could wipe out years of small wins. A near-perfect win rate is hiding a huge risk. (Please don’t trade this way. It’s an example of how win rate can lie, not a strategy.)

So what should you measure instead? Look at the combination:

• Monthly growth, based on net realized gains: closed trades, after losses, not just a balance that happens to look higher
• Maximum daily drawdown: the worst single day
• Maximum drawdown: the deepest fall from a peak
• Expectancy: what you make on average per trade, in R or dollars

A trader growing steadily with small drawdowns is in a far better position than one with a 90% win rate and occasional catastrophic losses. If you trade a prop firm account, daily and maximum drawdown are literally the rules; see our guide to daily drawdown. A trading journal is the easiest way to track all of these.

Your exit is a decision, not a setting

Here’s the mistake I see most in content creator advice. Trades are presented as all-or-nothing: you hit the target, or you hit the stop. Set it and forget it.

That’s a big mistake. A trade might be well in profit at some point and then reverse all the way back to the stop, because the stop was never moved. Or the trader never learned how to trail a stop properly, so they either give back everything or get stopped out too early.

The way I think about it, every trade starts out as a scalp. Then you manage the position and let it develop. Some trades never go anywhere, and you close them small. Others turn into a 1:3, or a 1:10. You don’t really know the trade’s risk-to-reward until it’s closed, so why set it in stone at the start, when managing the trade is your job?

That means having a plan for:

• When to move your stop to break-even, so a winning trade can’t turn into a loss
• How to trail your stop as the trade moves, behind structure or levels
• When to take partial profits, if that’s part of your approach
• What would make you exit early, because conditions changed

One caution: moving to break-even too early has a cost too. You’ll get stopped out of trades that would have worked. That’s why these rules belong in your plan, tested in advance, not decided on the spot.

The easiest part of trading is getting into a trade. The hardest part is following through to the best exit, whether that ends up as a profit or a smaller loss.

Find the approach that fits you

There’s no single right ratio. The right approach depends on:

• Your risk tolerance: how much drawdown you can handle without breaking your plan
• Your patience: whether you can sit through long losing streaks
• How often your setups appear, and at what time of day
• When you can actually monitor trades. A setup that shows up during the London session, at 3 or 4 a.m. Toronto time, isn’t much use if you’re asleep. An afternoon setup might suit you far better.

The best way to find your fit is to backtest a few approaches: different ratios, different risk amounts, different times of day. See which one produces results you can actually live with, not just the best number on a spreadsheet. We’ll cover backtesting properly in a future article.

This is also where working with a mentor helps most. Sitting down with someone experienced to build a trade action plan around your schedule, your temperament, and your instruments beats copying a ratio from a video. For more on planning trades around your day, see currency trading strategies for Toronto traders, and for the emotional side, trading psychology.

The bottom line

Risk-to-reward and win rate only make sense together, alongside your risk per trade. A 1:5 approach needs fewer wins but demands patience through long losing streaks. A 1:1 approach needs a high win rate but is easier to live with. Never double up after losses. Judge yourself on net realized growth and drawdown, not win rate. And treat every exit as something you manage, not something you set and forget.

Disclosure: The author, Mike Harding, founded Academy of Financial Markets in Toronto and teaches its mentorship program. Figures in this article are illustrations and exclude spreads and commissions. This article is educational and is not financial advice. Trading carries a high level of risk.