Exness Lot Size Calculator: Sizing the Volume Field · Tanzania
Position size has three limits and the smallest of them wins: the money the account is willing to lose at the stop, the step and range the symbol accepts in the Volume field, and the margin the account can still spare. Sizing that ignores the last two produces a number the ticket refuses.
A risk rule produces a number; the Volume field decides whether that number can be typed at all. Sizes move in fixed steps, every symbol carries a smallest and a largest order of its own, and free margin puts a ceiling on top of both — so the size that is finally accepted is often not the size the arithmetic gave first. The panel below takes the balance, the risk and the stop distance and returns a figure in lots on measured contract specifications; what follows explains what can still cut it down.
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Calculations use spreads and contract specs measured on a live Exness Standard account (2026-08-16). Figures are indicative — spreads may fluctuate and actual results will vary.
What volume does a $1,000 account risking 2% accept?
Risking 2% of a $1,000 account puts $20 at risk. With a 30-pip stop-loss on EUR/USD, where one pip per lot is worth about $10.00 at measured specs, the size is about 0.07 lots — around 7,000 units, needing about $40.50 of margin at 1:200 leverage.
Figures are indicative, from spreads and contract specs measured on a live Exness Standard account (2026-08-16). Converted to a local currency, the same amounts follow the current exchange rate, which changes through the day.
Questions about the size
Why is 0.007 lot not accepted?
Should a raw size be rounded up or down?
Why does a wider stop force a smaller size?
Can the free margin ceiling be avoided?
Does the minimum size make a small account riskier?
Is the accepted size the same on every instrument?
Why does a wider stop shrink the accepted size?
Does another account currency change the arithmetic?
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The Volume field only accepts certain numbers
Order sizes are quantised. Volume moves in fixed increments — 0.01 lot on the standard forex contract — so a figure that lands between two steps is rounded rather than taken as typed, and rounding up is not neutral: it raises the margin held and the loss at the stop together.
Every instrument also carries a smallest and a largest order size of its own, and they are not uniform across the list. A size that works on a currency pair can sit below the minimum on an index or above the maximum on a thin instrument.
For a small account the practical consequence is that the step, not the risk rule, sets the resolution. At the smallest accepted size the risk per trade is whatever the stop distance makes it, and the only ways down from there are a tighter stop or a different instrument.
When free margin, not risk, caps the size
The size a risk rule suggests is checked twice: once against the money lost if the stop is hit, and once against the margin needed to hold the position at all. Those are different questions, and on a high-volatility instrument the second one bites first.
Margin is notional divided by leverage, so it grows in a straight line with volume, while the loss at the stop grows with volume and stop distance together. Two accounts with the same balance and different open positions will accept different sizes on the same setup.
Reading the free margin figure before typing is worth more than reading it after the refusal. A ticket that fails on margin has already said that the account is fuller than the plan assumed.
Getting from a risk figure to an accepted volume
- Fix the stop distance first — without it, risk in money cannot become size in lots.
- Convert the risk into money: a share of balance is easier to hold constant than a figure chosen trade by trade.
- Divide by the loss per lot at that stop distance to get the raw size.
- Round the raw size down to the symbol step, never up.
- Check the rounded size against the smallest and largest order the symbol accepts.
- Check the margin it needs against the free margin on the account, and keep the smaller of the two answers.
What limits the volume, and in what order
| Limit | Where it comes from | What it does to the number |
|---|---|---|
| Risk at the stop | Balance and the stop distance | Sets the raw size |
| Volume step | Symbol specification | Rounds the raw size down to a typable figure |
| Smallest order | Symbol specification | Puts a floor under the size, whatever the risk rule says |
| Largest order | Symbol specification | Caps a single ticket; more exposure needs more than one |
| Free margin | Equity minus margin already held | Can cut the size below all of the above |
Indicative — steps and contract specifications are read from a live Exness Standard account.