Does an 80% win rate mean you make money?
The most common number in trading marketing, checked with nothing but arithmetic.
Verdict
"80% win rate" — on its own, it tells you nothing about whether a strategy makes money.
A win rate is half of a calculation. Without the size of the average win, the size of the average loss, and the cost of each trade, a strategy that wins 80% of the time can lose money every month.
You've seen the claim.
An indicator that's "right 8 times out of 10." A strategy with an "80% win rate." A screenshot of a trade log that's almost entirely green.
It sounds like the only number that matters. Win most of the time, and surely you come out ahead.
Not necessarily. Here's why, in about six minutes.
You don't need to know anything about trading to follow this. A win rate is simply the share of trades that made money. If you took 10 trades and 8 were winners, your win rate is 80%.
The two numbers nobody puts next to it
A win rate counts how often you win. It says nothing about how much.
Picture it.
A strategy wins 80% of the time. When it wins, it makes $50. When it loses, it loses $250.
Ten trades: eight wins of $50 is $400. Two losses of $250 is $500.
Net: −$100. Every ten trades. At an 80% win rate.
Made-up numbers for illustration — the shape is exactly how it works with real ones.
This isn't a trick example. It's what happens naturally when someone takes profits quickly and lets losing trades run, hoping they come back. It feels wonderful to trade — green, green, green, green — right up until the loss that takes it all back and more.
How often you win and how much you make are two different questions.
The number that actually matters: your breakeven win rate
Every strategy has a win rate it has to beat just to get back to zero. Below it, you lose money. Above it, you make money. It depends only on the size of your average win and your average loss:
Breakeven win rate = average loss ÷ (average win + average loss)
If your average loss is three times your average win, you need to win 75% of the time just to break even.
| Average win vs. average loss | Win rate needed to break even |
|---|---|
| Win $1, lose $4 | 80% |
| Win $1, lose $3 | 75% |
| Win $1, lose $2 | 67% |
| Win $1, lose $1 | 50% |
| Win $2, lose $1 | 33% |
| Win $3, lose $1 | 25% |
Read the top row again. A strategy that wins $1 for every $4 it loses needs an 80% win rate just to stand still.
And the bottom row: a strategy that wins only a quarter of the time can break even, if the wins are three times the size of the losses.
A high win rate isn't good or bad. It's only meaningful next to the size of the wins and losses.
Then add what each trade costs
Every trade has costs: the spread (the gap between the price you can buy at and the price you can sell at), commissions, and slippage (the difference between the price you wanted and the price you got). They come out of every winner and add to every loser.
Take a strategy that's genuinely good on paper: wins 80% of the time, makes $50 when it wins, loses $150 when it loses. Its breakeven win rate is 75%, so at 80% it's comfortably profitable — +$100 every ten trades.
Now add a round-trip cost of $6 per trade — in and out.
| Before costs | After $6 per trade | |
|---|---|---|
| Average win | $50 | $44 |
| Average loss | $150 | $156 |
| Breakeven win rate | 75% | 78% |
| Result per 10 trades at 80% | +$100 | +$40 |
Costs took 60% of the profit. And the strategy is now only two points away from losing money. If its real win rate turns out to be 77% instead of 80%, it loses about $200 every hundred trades.
$6 is an illustrative figure. Your real costs depend on what you trade and where — and they're knowable. The free Module 3 shows you exactly where to find yours.
And ask how many trades it's based on
An 80% win rate from ten trades is eight wins and two losses. That can happen by luck.
Flip a fair coin ten times and you'll get eight or more heads about one time in eighteen. Plenty of strategies with no edge at all will post a short, beautiful record by chance — and those are the records that get screenshotted.
A win rate means more the more trades are behind it. Ten trades tells you very little. Hundreds start to mean something.
Check any strategy yourself
Enter the average win and loss in dollars (before costs), and what one round trip costs you.
win rate needed just to break even, after costs
How to check any win-rate claim
Next time you see a win rate, ask four questions:
- What's the average win, and what's the average loss? Without both, the win rate is half an answer.
- Is it after costs? Spread, commission and slippage come out of every trade.
- How many trades is it based on? Ten trades can be luck. Hundreds start to mean something.
- Were they real trades? A record built by looking back at old charts isn't the same as money placed live.
If a claim can't answer those, it hasn't told you whether the strategy makes money. It's told you it wins often.
Accurate about what — and did it pay?
Where to go from here
Costs are the part almost everyone skips. In the largest study of day traders ever done, they caused most of the average trader's losses. Module 3 — What a trade actually costs walks through it from zero, and it's free.
Or start at the beginning with Module 1 →
Educational material only — not financial advice. Most people who day trade lose money.