R-Multiple Calculator: Stop Judging a Trade by the Dollar Amount
- Erica Lorrai

- Jul 7
- 9 min read
Updated: 1 day ago
You made $100 on a trade. Was that good?
Depends what you put up to get it. Risk $25 and make $100, you just made four times what you were willing to lose. Risk $500 to make that same $100 and you had twenty times your winnings sitting on the line the whole time. Same hundred bucks lands in your account either way. Those are not the same trade, and the dollar amount can't tell them apart.
R can. R is the unit we use to measure a trade against the risk it took, and once you start logging trades this way your journal gets a lot more honest.

What R actually is
R is whatever you decided to risk on that trade before you got in.
Risk $50, and 1R is $50 for that trade. Risk $200 on the next one and 1R is $200 for that one. It's not a fixed dollar amount that follows you around, it's a unit that resets to whatever you had on the line at the time.
Everything the trade does after that gets measured against that number. Make $100 on a $50 risk, that's +2R. Lose the whole $50, that's -1R. Scrape out $25 before you close it, +0.5R.
The math is your profit or loss divided by your initial risk, and that's the entire thing. Plug in what you risked and what you ended up with and you get your R.

Why the dollar amount lies to you
Two trades. Trade A risked $500 and made $500. Trade B risked $50 and made $200.
In dollars Trade A wins, it made more than twice the money. In R, Trade A made +1R and Trade B made +4R. B got four times its risk back. A got one.
If you're deciding which of those setups to go looking for again, you want the second one. The dollar column would have sent you after the first.
This is also why somebody's screenshot of +$4,300 tells you nothing. You have no idea whether they risked eight grand to get it. It's a useless fucking number on its own, and the whole industry runs on it.
Your account grows and the dollars stop meaning anything
Say you start with $1,000 and risk 1%. 1R is $10. Account gets to $5,000, now 1R is $50. Account gets to $10,000, 1R is $100.
Every trade you take next year is going to look enormous compared to every trade you took this year, and none of that has anything to do with whether you got better at this. A +2R last spring and a +2R this morning are the same piece of work. Only one of them bought groceries.
R lets you look at your own trading over time without your account balance yelling over the top of it.
Try the R-Multiple Calculator
Enter your amount risked and profit or loss. The calculator will show your R-multiple. For example:
Risk $100 / Profit $200 = +2R
Risk $100 / Loss $100 = -1R
Risk $100 / Profit $50 = +0.5R
Risk $100 / Loss $50 = -0.5R
Simple. And ridiculously useful.
1R gets set before you click the button
This one is stricter than people want it to be.
Your R is defined by the risk you actually planned when you entered. Not the risk you decide, afterwards, that you would have been comfortable with.
You planned to risk $50, you lost the $50, that's -1R. You don't get to say "well honestly I'd have been fine losing $100" and log it as -0.5R. It goes the other way too, don't quietly adjust the risk number after a winner to make the R read the way you want. Whichever direction the fudging goes, you've just spent all that effort building a journal that tells you a story instead of the truth.
Pick your definition, write it at the top of your journal, and use the same one on every trade. Consistency matters more here than cleverness.
When the loss isn't exactly -1R
A full, clean stop out is -1R. That's what a normal loss looks like when everything goes the way you set it up.
But you'll get losses that aren't -1R, in both directions, and those are the ones worth looking at.
Smaller ones first. You risked $100, the setup fell apart before price got to your stop, you closed it for -$40. That's -0.4R. Perfectly legitimate, and it matters, because if your average loser is -0.7R instead of -1R, your whole expectancy is different from what you assumed.
Bigger ones are the ones that should get your attention. You planned to risk $100 and you lost $160, that's -1.6R. There's usually a reason, and it's worth naming it in the journal:
You moved the stop.
You added to a losing position.
Price gapped or slipped through your stop.
You saw the trade invalidate and didn't get out.
Some of those are the market and some of those are you, and R is what makes you sort out which is which, because a page full of "LOSS" entries hides all of it.
Winners work the same way. You risk $100 and make $40, that's +0.4R, and it's still a win. If your journal rounds every winner up to "W" you have thrown away the information that would tell you your winners aren't big enough to carry your losers.

Planned R against what you actually got
This is the most useful thing R does, and it's the reason I want you logging it.
You plan a trade with a 1:3 risk to reward. If it runs to target, that's +3R. Fine. But you close it early at +1.4R. Your journal gets +1.4R. The chart can go on to tap your original target an hour later and it's still +1.4R, because that's what you actually captured.
Now do that fifty times and look at the two columns together. Say your average planned target is +2.5R and your average realized winner is +0.8R.
That's not an entry problem. Your entries might be completely fine. Your exits are eating the method alive, and without R you'd have spent six months tearing apart your entry criteria for no reason.
You can go further with this if you track your maximum favourable excursion, which is just the furthest price got in your favour before the trade closed. Planned 3R, took 1R, price ran to 3.5R. Once is a story. Twenty times is a habit, and the habit is costing you more than any losing trade ever has.
Partials, break even stops, and adding to a position
Three situations that confuse people about what R to record.
Partials first. 1R is $100 and your final target is 3R. You take half the position off at +1R, a quarter at +2R, and the last quarter at +3R. Half of 1R is 0.5R, a quarter of 2R is another 0.5R, a quarter of 3R is 0.75R. Add them up and your trade was +1.75R, even though price reached your 3R target. That's the number that goes in the journal. Not the target you touched, what you actually collected.
Moving your stop to break even doesn't change anything. 1R was $100 when you entered and it stays $100. Take the trade off for $200 and it's +2R. You don't get to call your risk zero because you removed it partway through.
Adding to a position, scaling in, is the messy one. If you started with $50 of risk and added a position carrying another $30, your total risk on the combined thing is $80. You have to decide whether you're journaling that as one trade or two, and then you have to decide it the same way every time. Either is defensible. Switching between them depending on how it turned out is not.
R isn't your risk percentage, and it isn't your risk to reward
These get tangled up constantly, so let's separate them.
Risk percentage is how much of your account 1R represents. If you risk 1% per trade, then a +2R trade is roughly +2% of the account. Risk 0.5% and that same +2R is about +1%. Roughly, because compounding and spread and commissions all nibble at it.
That's why two people can both post +2R and have wildly different days. One risked 0.5% and made about 1%. One risked 5% and made about 10%, and is going to blow up eventually. R says nothing about how much of your account you had at stake. You still need a separate rule for that.
Risk to reward is the plan. Stop at 20 pips, target at 60, that's 1:3, which is a planned 3R. R-multiple is the receipt. It's what the trade actually did. When those two numbers keep disagreeing, that's information about you, not about the market.

What R does to a journal
Look at a run of trades in dollars: +$120, -$40, +$75, -$55, +$300, -$90.
Now the same trades in R: +2R, -1R, +1.5R, -0.5R, +3R, -1R.
The second one you can actually read. Winners bigger than losers, one full stop out that behaved, one loss you cut early. And you can add them up, which you cannot meaningfully do with the dollar version. Total +4R across six trades, so +0.67R per trade on average.
Once you have that, the rest of your numbers come easy. Expectancy is your win rate times your average winner, minus your loss rate times your average loser. Win 45% of the time, average winner +2R, average loser -1R, that's (0.45 × 2) − (0.55 × 1) = +0.35R per trade. Profit factor is your total winning R divided by your total losing R, so +60R of wins against -40R of losses is 1.5.
Neither of those numbers cares what your account balance is, which means they still mean something next year when the balance is different.
You can plot the whole thing too. Instead of an equity curve in dollars, run a cumulative R curve. +2R, then 1R, then 4R, then 3.5R, and on down the list. Drawdown gets measured the same way, peak at +30R, low at +22R, that's an 8R drawdown. Now you know what a rough patch looks like for your method, in a unit that'll still be accurate after your account doubles.
Six losses in a row is -6R whether you're trading five hundred dollars or fifty thousand. What that -6R does to your account is a separate question, and it's the risk percentage question, not the R question.

Sorting your R by things that aren't the setup
This is where the journal stops being a diary.
Group your R by setup and you find out which one is carrying the account. Group it by pair, by session, by long versus short. Maybe London is +40R and Asia is -7R. Before you swear off Asia forever, count the trades. If there are eleven of them you don't have a finding, you have a coincidence. Sample size first, opinions later.
The grouping I'd do first, though, is by whether you followed your own rules. A hundred trades where you followed the plan, +38R. Thirty-five trades where you didn't, -14R.
Well. That's irritatingly clear.
Most people go looking for a better strategy when what they actually have is a compliance problem, and this is the single split that shows it to you.
What the R-multiple calculator won't tell you
It won't tell you whether the trade was any good.
You can break every rule you have, ignore your setup, size wrong, get lucky, and catch a runner for +5R. The calculator will say +5R, because it's correct, and it has no opinion about your decision making.
That was a bad trade. It made money and it was a bad trade, and if you log it as a success you'll do it again, and the next one will not run.
Same in reverse. You find a clean setup, size it right, put the stop where it belongs, and price invalidates you. -1R. That was good trading. It just didn't pay.
So log both. R for the result and a separate note for whether you followed the plan. Those two columns disagreeing is the most useful thing your journal will ever show you.
Pips and dollars still belong in there
I'm not telling you to stop tracking money. Log all three, they answer different questions.
Pips tell you how far price moved. Dollars tell you what happened to the account, which is the one that pays your rent. R tells you how the trade did against what it risked.
The reason to have R sitting next to the other two is that it deflates the numbers that mess with your head. A 100 pip winner that took 100 pips of risk is +1R. A 30 pip winner that took 10 pips of risk is +3R. The little one was three times the trade. Pip counts on their own are a bragging metric, and so are dollar screenshots, and both of them will make you feel worse than you should about perfectly good trading.
So go pull up your last twenty trades. Put the planned risk and the actual result for each one into the calculator and write the R next to it. Then look at your average winner against your average loser, and look at how many of those winners came in under your planned target. That's your homework, and I'd bet money the answer surprises you.
Educational purposes only. Forex trading involves substantial risk. R-multiples measure a trade's result against its initial planned risk and don't predict future performance. Real results can differ from planned R because of slippage, gaps, spread, commissions, execution, and stop changes.
Educational purposes only. Forex trading involves substantial risk. R-multiple calculations measure trade results relative to defined initial risk and do not predict future performance. Actual account results can differ because of position sizing, trading costs, slippage, execution, scaling, and changing market conditions.
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