Forex Stop Loss Calculator

The stop comes first and the size comes second

Everything on this page runs in one direction. You decide where the trade is wrong — a level that, if price reaches it, means the reason for the trade is gone — and that level decides how many pips are at stake. The pips then decide the size, because the money you are willing to lose is fixed and the pips tell you what one lot of those pips costs.

Running it the other way is the common failure. Pick a size first, then look for a stop that fits it, and the stop lands wherever the arithmetic needs it to land rather than wherever the trade stops being right. The size looks tidy and the stop is a number pulled out of the air. A stop that is invented to fit a position is not a stop.

The order also explains why the same risk percentage produces wildly different sizes. Two percent of an account is one number of dollars. Spread over a ten pip stop it buys a large position; spread over a hundred pip stop it buys a tenth of that. The percentage did not change. The stop did, and the stop is the part that belongs to the trade rather than to the account.

The percentage is a ceiling, not the risk

A risk percentage is a budget you set before you know what size the platform will accept. The size the arithmetic asks for is a continuous number; the size you can enter is not, because a symbol only accepts volumes that land on its step. The two differ, and the money at risk differs with them.

Rounding downwards is the direction that keeps the budget intact. The position comes out slightly smaller than planned, so the money at risk comes in under the limit rather than over it. The first tool above rounds down and then reports the risk at the size you can actually place, so the gap is visible rather than silent — that is what the "share of the account at risk" line is for. It is nearly always a little under the percentage you typed, and if it is ever over it, the size was rounded the wrong way somewhere else.

The floor is a harder limit than the step. If the size the risk allows is below the symbol's minimum volume, there is no version of this trade that fits the plan, and no amount of rounding gets you there. The only exits are a tighter stop — which raises the size the risk allows — or no trade.

Balance or equity: what the percentage is taken of

Balance is what the account holds with nothing open. Equity is balance plus the floating result on everything currently open. A percentage applied to one is a different number of dollars from the same percentage applied to the other, and the gap is exactly the floating figure.

Which one matters depends on how many positions you carry. With nothing open they are the same number and the question is academic. With five open trades showing a loss, equity is the smaller of the two, and a percentage of balance risks more of what you actually have left than the same percentage of equity does. With open profits the position reverses: equity is larger, so a percentage of it risks more dollars.

Neither is a rule, and this page does not pick one for you — the second tool takes the percentage of whichever you select and prints the base it used, so the choice is on the record instead of buried in the number. What matters is that you make the same choice every time, because switching between the two mid-run changes the dollar amount without changing the stated percentage.

Losses multiply, and the way back is longer than the way down

A fixed percentage takes a share of whatever the account holds at the moment, not of what it held when the run started. Ten losses at two percent of a 10,000 account therefore does not cost 2,000. The first costs 200, the second costs two percent of 9,800, which is 196, and by the tenth the account is down 18.29%.

That figure is smaller than the 20% you get by adding them up, which is the one sense in which a fixed percentage is gentler than a fixed dollar amount. The way back is where it stops being gentle. Getting from 81.71% of where you started back to 100% needs a gain of 22.39% on what is left, and the gap between the fall and the climb widens with every loss in the run: at twenty losses it is 33.24% down and 49.79% back.

The table above is that arithmetic for both percentages at five run lengths, and the second tool computes it for whatever numbers you enter. Two things it shows that the percentage alone does not: how many losses in a row it takes to halve the account — sixty-nine at one percent, thirty-five at two — and what happens if you keep risking the same dollar amount instead of the same percentage.

A fixed dollar amount does not stay a fixed percentage

The alternative to a fixed percentage is a fixed amount of money per trade, which usually means a fixed number of lots held constant for a while. The dollar risk stays put; the account does not. After a losing run, the same dollars are a larger share of a smaller account, so the risk percentage drifts upward without anyone deciding that it should.

The second tool prints that drifted figure next to the starting one. In the default case — one percent of 10,000, so 100 dollars — ten losses leave 9,000, and the same 100 dollars is now 1.11% of the account. Nothing was changed on purpose and the risk went up by an eleventh. Run it far enough and the drift is the whole story: a fixed amount risked on an account that has halved is twice the percentage it started as.

This is the trade-off, and it is arithmetic rather than opinion. The fixed percentage shrinks the position after losses, so recovery from a drawdown takes longer in good conditions. The fixed amount keeps the position, so the account shrinks faster in bad ones and the percentage quietly climbs. Whichever you choose, the choice is only stable if the percentage is recomputed on the current base each time. What that recomputation does across a whole run — and how often it has to happen before the order of your results stops mattering — is worked out on the forex compounding calculator.

Risk per trade is not risk per account

A per-trade limit bounds one position. It says nothing about six of them open at once. Six trades at one percent each is six percent of the account moving together, and the money at risk is the sum, which is the number to check before the next order goes in rather than after.

The sum is not the whole of it either, because positions in different symbols can be the same bet. A long in EURUSD and a long in GBPUSD are both long the same thing against the dollar, and both lose together when the dollar strengthens. Two trades that looked like two independent one percent risks behave like one two percent risk on the day it matters. Counting the money at risk per currency, rather than per pair, is the check that catches this — and it needs no market view to do.

The drawdown that results from a run of losses at the size you chose is on the drawdown calculator. It shows the peak-to-trough fall and the gain needed to get back under different sizing rules.

A stop is an order, not a guarantee

Everything above treats the stop as a price, because that is what you type into the platform. What it actually is, is an instruction: once price trades at or through that level, close the position at the best price available. Those two are the same thing most of the time and not the same thing when they need to be.

Over a weekend, across a data release, or through any gap, price can move from one side of your level to the other without trading at it. The order triggers and fills where it can, which is worse than the level. This is why the money at risk is a planning figure: it is what the trade costs when the stop does its job, not a ceiling on what a trade can cost. The weekend is the largest of those gaps: from Friday 17:00 New York time to Sunday 17:00 there is no market to fill an order into, and the forex market hours page shows when that window opens and closes on your clock.

There is a smaller, constant version of the same thing. Your levels come off a chart, and charts generally draw the bid. A long is filled at the ask and closed at the bid, so the distance you measured off the chart is one spread shorter than the distance you actually pay for. The first tool takes an optional spread and adds it once, which is why "distance you actually lose over" can sit a pip above the distance you typed.

Where the stop distance comes from

Every other number on this page is one you already have. The account size is on the platform. The percentage is your decision. What a pip is worth comes off the symbol. The stop distance is the only input the market has a say in, and it is the one the whole calculation is divided by — which is worth knowing, because it makes the distance the place where a size goes wrong.

How do I set a stop loss with ATR?

ATR — average true range — is a volatility figure your platform already works out: the average of the true range over however many bars you tell it to use. "True" is the part that carries the weight. The true range of a bar is the largest of three distances: the bar's own height, the gap from the previous close up to the bar's high, and the gap from the previous close down to its low. Those last two are movement that happened between bars — across a session break or a weekend — at prices no order could have been filled at. A stop distance borrowed from ATR therefore carries some distance your stop cannot be filled inside, which is the same gap the section above describes from the other side.

ATR comes out as a price, so it needs the same conversion as any other price: divide by the pip size. The same volatility then reads as two numbers a hundred times apart depending on where the decimal sits — an ATR of 0.004 on a four-decimal pair and 0.4 on a two-decimal pair are both forty pips. Multiply that by a number of your own choosing and you have a stop distance in pips, which is exactly the input the first tool on this page is asking for.

What a volatility-scaled stop does to the size

Take one trade — a 10,000 account, one percent at risk, ten units of account currency per pip per lot — and hold the volatility still while changing only how many ATRs wide the stop is. One ATR is forty pips here.

Read the size column: it halves every time the distance doubles. That is not a coincidence of these four numbers, it is the shape of the calculation — the money at risk is fixed, and the size is that money divided by the distance. With a volatility-scaled stop and a fixed percentage, the position size stops being a number you pick and becomes a number that comes out at the end, and it moves whenever volatility does.

That leads to a choice most people make without noticing. A fixed lot size, a stop that follows volatility, and a fixed amount of money at risk — you can have two of the three. Hold the size at 0.50 lots and let the stop follow ATR, and the money at risk is whatever the distance says it is:

The last two rows are not typos. Two percent and four percent of the account are what a fixed size risks once the stop is allowed to widen with volatility. If the money is the part that has to stay put, the size is the part that has to move.

The last row of the first table shows the other end of the same thing. At eighty pips the size the arithmetic asks for is 0.125 and the step brings it down to 0.12, so the money at risk comes in at $96 rather than $100 — under the budget rather than over, which is the direction rounding goes on this page. None of that makes the distance unimportant. It means a wrong distance is not paid for in the size: a stop set inside the noise costs you the same hundred dollars more often, and a stop set far too wide leaves you holding a position too small for the cost of getting in and out to be worth paying, which the forex profit calculator puts a pip figure on.

Can I use a lot size calculator without a stop loss?

Not this one, and not because of a rule — because of arithmetic. The size is the budget divided by the distance. Take the distance away and there is nothing left to divide by. A tool that hands you a size without asking where the trade is wrong is not answering the risk question at all; it is answering a different one, usually how much the margin will allow, which is a question about what you can hold rather than what you can lose.

The honest description of a trade with no stop is not a smaller size, it is a different trade: the loss is bounded by wherever the margin runs out, and that bound is set by the platform rather than by your budget. The forex margin calculator measures that distance. It is a larger number than one percent, and it means something else entirely. It also stops at one level rather than two: the level it warns at and the level it closes at are separate settings, and the pips between them are worked out in the margin call and stop out section there.

What this page does not assume about volatility stops

No ATR value and no default period. Your platform computes it from a setting you chose, and the figure changes with that setting, so any number printed here would be a number about somebody else's chart.

No multiplier. How many ATRs wide a stop should be is not a constant anyone can hand you, and this page does not supply one.

No claim that a volatility stop is the right stop. It is one way to arrive at a distance, and the distance is still a judgement about where the trade stops being right. No average makes that judgement for you.

No fill guarantee inside the average. Part of a true range is movement between bars, at prices an order could not have been filled at.

No forecast. ATR describes what the market did over the bars you averaged. It does not say what it does next, and a stop sized from it is not protected by it.

What this page does not assume

No contract size, no pip value, no volume step, no minimum or maximum volume, no spread and no currency rate. Every one of them is a field on this page or a figure you type, because every one of them is set by a symbol on a broker and none of them is a fact about forex in general.

No leverage and no margin either. Leverage changes what a position costs to hold, not what it costs to lose; those are two different numbers and only one of them is risk. The margin your platform will demand is built from settings this page cannot see, so no tool here prints one.

No prices. There is no market feed behind this site, and every price on the page is one you typed. That is what makes the arithmetic checkable against your own platform line by line instead of something you have to trust.

Frequently asked questions

How do I calculate stop loss in forex?

Decide the level first, then measure it. Take the distance between your entry price and your stop price, divide by the pip size for that pair — 0.0001 on a four-decimal pair, 0.01 on a JPY pair — and you have the stop in pips. Multiply by the money one pip is worth per lot and you have what the stop costs per lot. The first tool on this page does all three from the two prices.

What percentage should I risk per trade?

This page does not pick one for you, because there is no number that is right without knowing the strategy around it. What it does instead is show what each number does: what a run of losses takes out of the account, how long the way back is, and how many losses in a row it takes to halve it. Run the percentages you are deciding between through the second tool and the difference is arithmetic rather than a matter of taste.

How many pips should my stop loss be?

As many as the distance to the level where the trade stops being right. That distance is a property of the chart, and it is different on every trade — a stop that is always twenty pips is a position sizing rule wearing a risk management label. The percentage then adjusts the size to fit the distance, which is the direction the calculation is meant to run in. How wide that distance is depends on the instrument, the volatility, and the structure of the chart you are trading. There is no single number that is right for every trade.

Is a stop loss guaranteed?

No. It is an order that triggers at a level and fills at whatever price is available, and through a gap or a weekend that price can be well past the level. Treat the money at risk as the planned cost of the trade, not as a maximum the platform enforces.

Does leverage change how much I risk?

No. Leverage changes the margin a position costs to hold. The risk is set by the account size, the percentage and the stop distance, none of which involve leverage. A small account with high leverage risks the same dollars on the same trade as a large account with none — it just has less left over once the position is open.

It does decide whether you get to hold the position until this stop is reached. The forex margin calculator measures how many pips the account can absorb and says whether that is more or less than the distance you planned.

Should the risk be calculated on balance or on equity?

Either, as long as it is the same one every time. Balance ignores open positions and equity includes them, so with open losses the two give different dollar amounts for the same percentage. Pick one and keep it: switching between them changes the money without changing the number you wrote down.

What is a risk per trade calculator?

A tool that turns a percentage of your account into a number of dollars, and then shows what repeated losses at that size do to the account. The second tool above does both: the dollar amount on the base you select, and the account after a run of losses with the gain needed to recover it.

What is an ATR stop loss?

A stop placed a chosen number of average true ranges away from the entry rather than at a fixed pip count. ATR is a price figure, so it has to be divided by the pip size before it means anything in pips, and because the multiplier is yours to pick, two traders using ATR on the same chart can come out with different distances. That distance is what you then size against, so the multiplier shows up in your position size rather than on the chart.

Does a wider stop loss mean a smaller position?

Yes, when the money at risk is fixed: the size is that money divided by the distance, so doubling the distance halves the size and the money stays where it was. It stops being true the moment the size is held fixed instead — hold the size and a wider stop costs more money. Which of the two happens is decided by which one you are holding constant.

How do I calculate risk in forex?

In money, not in pips: the size multiplied by the stop distance multiplied by what one pip is worth. Everything on this page runs the other way round — you say how much of the account you are willing to lose, the distance tells you what one lot of that distance costs, and the size is the first figure divided by the second. A risk figure written in pips alone is not a risk figure, because twenty pips is a different amount of money at every size.

What is a forex risk management calculator?

A lot size calculator that stops at the lot size has done half the job. Risk management is the half after the size: what a run of losses takes out of the account, how large a gain the way back needs, and whether the percentage you picked survives being repeated. The second tool on this page is that half. If a page gives you a volume and says nothing about what happens when you are wrong ten times in a row, it has given you a number, not a plan.

How many units is 0.1 lots?

Whatever 0.1 times the contract size comes to, and the contract size is per symbol rather than a forex constant. At the common 100,000 units per lot it is 10,000 units; on a symbol set to 10,000 it is 1,000. The third tool above takes the contract size as an input and prints the units rather than assuming the convention.

How do I set a take profit and a stop loss at the same time?

Set them as two prices on the same order, or as two separate orders, and the size is one number that applies to both. The risk is the stop distance in pips, the reward is the target distance in pips, and the ratio between them is what the risk reward calculator reads. The size itself is set by the stop, not the target, and the same lot size covers both sides of the trade because the position is closed by whichever order fills first.

What is a take profit calculator?

It is a stop-distance calculator run on the other side of the entry. The same inputs — entry price, target price, lot size, and what one pip is worth in your account currency — return how many pips the target sits at, and how much money the position earns if it fills. The forex profit calculator does this directly, and the risk reward calculator divides the target distance by the stop distance to give the ratio the trade is sized against.

What is a partial take profit and a partial close?

Closing part of the position at one target and leaving the rest to a further target, or trailing it with a stop. The arithmetic on the first close is the same as a full trade: a fraction of the lot size multiplied by the target distance and the per-pip value. The remaining position runs the same arithmetic from a different size. Most platforms take a partial close as a separate order with its own volume, and the broker decides the minimum size that can be closed, which the page does not model.

Give the lot size calculator a stop in pips and it returns the size directly. The risk reward calculator takes the other half — what the target pays against what the stop costs — and the pip calculator gives the per-pip figure this page asks for. If the size is going into MetaTrader, the MT4 lot size calculator handles the volume step and the points-to-pips conversion. The same calculation on instruments with no standard contract has its own pages: XAUUSD, US30 and BTCUSD. The percentage you type in here is the one input the size depends on most, and if you want it derived rather than chosen, the risk reward calculator works out the Kelly fraction from a win rate and a reward per unit risked.