Position size on a prop firm challenge comes from one line of arithmetic: lots = (account size × risk per trade) ÷ (stop distance in pips × pip value per lot). On a $100,000 account risking 1% with a 50-pip stop on EURUSD, that is $1,000 ÷ (50 × $10) = 2.00 lots. The same 1% on a $50,000 account is 1.00 lot, and on $200,000 it is 4.00 lots. What makes prop firm sizing different from sizing your own account is that the result then has to fit inside three limits at once: the daily loss limit, the maximum drawdown and, on Dolvero evaluations, the 2% cap per trade idea. This guide gives you the formula, the pip values you need, a calculator that applies all three limits, and a lot size table for the most common account sizes and stops.
- Risk in dollars first, lots second. Decide the percentage, turn it into dollars, then divide by what one lot loses at your stop. Never start from a lot size.
- Pip value per standard lot is a convention you can memorise: $10 on EURUSD and GBPUSD, about $6.67 on USDJPY at 150, $10 per 0.10 move on gold, $1 per point on US30 and $1 per dollar on BTCUSD.
- On a Dolvero 2-Step, 1% risk per trade leaves you five independent losses before the 5% daily limit and ten before the 10% static floor. At 2% you have two and five.
- The 2% cap per trade idea on Dolvero evaluations is a ceiling on lots, not a target. The calculator shows both your intended size and the capped size.
- Gold is the instrument that appears most often in Dolvero breach records, almost always because the pip value per lot was underestimated. A 0.95-lot gold position moves $95 for every $1 in the price.
- Dolvero shows the distance to every limit in dollars in the dashboard, in real time, so a sizing mistake is visible before it becomes a breach.
- 2-Step daily limit
- 5%of the day's starting balance
- 2-Step max drawdown
- 10%static, never moves
- Cap per trade idea
- 2%2-Step and 1-Step evaluations
- 1-Step limits
- 3% / 6%daily / trailing floor
- Instant Funding limits
- 2% / 5%daily / trailing from highest balance
- Breached accounts, daily limit
- 75.4%share of all accounts with a breach
The formula, step by step
Every position size calculator, including the one below, does the same four operations. Knowing them by heart matters because you will size trades at moments when opening a calculator is the last thing you want to do.
- Turn the percentage into dollars. Risk in USD = account size × risk per trade. $100,000 × 1% = $1,000. On Dolvero the daily limit is measured against the day's starting balance, so on a day that starts at $98,400 the same 1% is $984. Use the starting balance the dashboard shows, not the number on the sales page.
- Measure the stop in pips or points. The stop is the distance from entry to the stop loss in the instrument's smallest quoted step: 0.0001 on EURUSD, 0.01 on USDJPY, 0.10 on gold, 1 point on US30 and $1 on BTCUSD. A 50-pip stop on EURUSD is 0.0050 in price.
- Find the pip value per standard lot. This is what one lot gains or loses when the price moves one pip. Multiply it by the stop distance to get the loss per lot at your stop: 50 pips × $10 = $500 per lot on EURUSD.
- Divide and round down. Lots = risk in USD ÷ loss per lot. $1,000 ÷ $500 = 2.00 lots. Round down to the platform's step, 0.01 lot on MT5 and Dolvero WebTrader. Rounding up is a small, silent increase in risk that adds up over a hundred trades.
- Check the limits. On a 2-Step or 1-Step evaluation the risk on one trade idea cannot exceed 2% of the account, so any result above 2% risk is cut to the capped lot size. Then check how many such losses the daily limit and the maximum drawdown floor can absorb. If the answer is one or two, the risk is too large for the account, whatever the setup looks like.
Pip values per standard lot
These are arithmetic conventions, not quotes: they follow from the contract size and the smallest price step, and the calculator uses them exactly as written. For pairs where the US dollar is the quote currency the value is fixed. For USDJPY the value in dollars depends on the exchange rate, because one pip is worth 1,000 yen per lot and you convert that to dollars at the current price. Always confirm the contract size in the instrument specification of your platform.
| Instrument | Contract per 1.00 lot | One pip or point | Value per lot | Note |
|---|---|---|---|---|
| EURUSD | 100,000 EUR | 0.0001 | $10 | fixed, USD is the quote currency |
| GBPUSD | 100,000 GBP | 0.0001 | $10 | fixed, USD is the quote currency |
| USDJPY | 100,000 USD | 0.01 | about $6.67 at 150.00 | 1,000 JPY per pip ÷ USDJPY rate; at 140 it is $7.14, at 160 it is $6.25 |
| XAUUSD (gold) | 100 troy ounces | 0.10 | $10 per 0.10, $100 per $1.00 | a $5 move against a 1.00-lot position is $500 |
| US30 | 1 contract | 1 point | $1 | a 200-point stop on 1.00 lot is $200 |
| BTCUSD | 1 BTC | $1 | $1 | a $1,500 stop on 0.10 lot is $150 |
The gold row is the one to read twice. Traders who move from EURUSD to gold often keep the same lot size and assume a similar dollar risk. On EURUSD, 1.00 lot with a 50-pip stop risks $500. On gold, 1.00 lot with a $5 stop risks $500 as well, but gold routinely moves $5 in a few minutes around a data release, and a $20 stop that looks reasonable on the chart is $2,000 per lot.
Position size calculator
Choose the model and account size, enter your risk per trade and the stop distance, and pick the instrument. The calculator returns the risk in dollars, the lot size, the lot size after Dolvero's 2% cap per trade idea, and how many losses of that size the daily limit and the maximum drawdown floor can take. It assumes a fresh account, where today's starting balance equals the account size; on a running account read the starting balance from the dashboard and use it as the account size.
1 pip = 0.0001, $10 per pip per lot
- Risk in USD
- $1,0001% of $100,000
- Lot size
- 2.0050 pips × $10 = $500 per lot
- Lots within the 2% cap
- 2.00inside the 2% cap of $2,000 per idea
- Losses until the daily limit
- 5daily limit $5,000, at $1,000 per trade
- Losses until the drawdown floor
- 10floor at $90,000, static
- Share of the daily limit per trade
- 20%one loss uses this much of today's allowance
Illustrative arithmetic on the published parameters and on the pip conventions above. The dashboard is the binding source during trading: it applies the exact day boundary, the live equity of all open positions and the contract size of your platform, none of which this calculator can see.
Lot size table: EURUSD on $50K, $100K and $200K
The table applies the formula to the three most common challenge sizes with a $10 pip value. Read it as a reference for the pair you trade most, and scale it for other pairs: GBPUSD is identical, USDJPY at 150 gives about 50% more lots for the same risk, gold in $0.10 pips reads the same as EURUSD.
| Account | Risk per trade | Risk in USD | 20-pip stop | 50-pip stop | 100-pip stop |
|---|---|---|---|---|---|
| $50,000 | 0.5% | $250 | 1.25 | 0.50 | 0.25 |
| $50,000 | 1% | $500 | 2.50 | 1.00 | 0.50 |
| $50,000 | 2% | $1,000 | 5.00 | 2.00 | 1.00 |
| $100,000 | 0.5% | $500 | 2.50 | 1.00 | 0.50 |
| $100,000 | 1% | $1,000 | 5.00 | 2.00 | 1.00 |
| $100,000 | 2% | $2,000 | 10.00 | 4.00 | 2.00 |
| $200,000 | 0.5% | $1,000 | 5.00 | 2.00 | 1.00 |
| $200,000 | 1% | $2,000 | 10.00 | 4.00 | 2.00 |
| $200,000 | 2% | $4,000 | 20.00 | 8.00 | 4.00 |
Two things stand out. First, the lot size doubles when the account doubles, so a trader who has a working size on $50,000 can move to $100,000 without changing anything except the multiplier. Second, the 2% rows are exactly the ceiling of Dolvero's cap per trade idea on evaluations: 10.00 lots at a 20-pip stop on $100,000 is the largest EURUSD position the rule allows for a single idea, and it is also the size at which two losses use 80% of the daily limit.
How the three Dolvero limits set your risk budget
The limits below are the same on the evaluation and on the funded account of each model. The table converts them to dollars on a $100,000 account and shows what they mean for a trader risking 1% and 2% per trade.
| Model | Daily limit | Max drawdown | Cap per trade idea | Losses to daily at 1% / 2% | Losses to floor at 1% / 2% |
|---|---|---|---|---|---|
| 2-Step CFD | $5,000 (5%) | $10,000 (10%) static | $2,000 (2%) | 5 / 2 | 10 / 5 |
| 1-Step CFD | $3,000 (3%) | $6,000 (6%) trailing | $2,000 (2%) | 3 / 1 | 6 / 3 |
| Instant Funding | $2,000 (2%) | $5,000 (5%) trailing from highest balance | none | 2 / 1 | 5 / 2 |
The daily column is the one that decides most accounts: 75.4% of all Dolvero accounts that have ever breached did so on the daily loss limit, against 10.0% on the maximum drawdown. That is not a reason to widen the daily limit, it is a reason to size from it. A useful rule is to divide the daily limit by the number of losses you want a bad day to survive. On the 2-Step, three losses means 1.67% per trade; five losses means 1%. On Instant Funding with a 2% daily limit, 1% per trade already means the day is over after the second loss, which is why 0.5% is the common choice there.
Open positions add up. The limits are measured on equity, so three positions each risking 1% are 3% of exposure right now, not three separate 1% events. The calculator's "losses until the daily limit" is also the maximum number of positions of that size you can have open at the same time.
On evaluations the cap per trade idea means no single position, or group of positions on the same idea, can take more than 2% of the account. On the 2-Step that is 40% of the daily allowance, so it takes at least three losing ideas in one day to fail, never one. In enforcement data the cap accounts for 6.8% of breached accounts, a fraction of the daily limit's share, which shows how rarely a disciplined trader meets it. A trader with a tested method that needs larger single positions takes the No Risk Limit add-on (+20% on the fee): the cap goes, the daily and maximum limits stay as the guardrails.
Gold: where the arithmetic breaks down in practice
Gold appears more often in Dolvero breach records than any other instrument. The reason is not that gold is dangerous, it is that its pip value per lot is ten times higher per unit of chart movement than most traders expect after years of forex. Two anonymised cases from September 2026 show the pattern.
On 9 September a $25,000 2-Step account held two XAUUSD sells of 0.95 and 0.74 lots plus one XAGUSD buy, and lost $1,259 combined, $9 more than the $1,250 daily limit. Run the numbers: 1.69 lots of gold move $169 for every $1 in the gold price. A move of about $7.40 against the position is the whole daily allowance. On a $25,000 2-Step, the 2% cap per idea is $500, which at a $5 stop allows 1.00 lot in total. The position was sized for the chart, not for the limit.
The same day a $5,000 Instant Funding account placed nine gold trades of 0.05 to 0.08 lots. Each one looked small, and each one was: at 0.08 lots a $5 move is $40. Together they summed to a loss of $154 against the $150 daily limit on that account (the $5K Instant promotion runs a 3% daily limit), $4 over. This is the second gold failure mode: each trade sized within reason, no count of the trades. Nine losses averaging $17 each is 3.1% of a $5,000 account. The habit that prevents it is a daily loss count: decide how many losses end the day, and the calculator tells you the size that number implies.
- Size gold in dollars of price movement, not in pips you carry over from forex. Decide the stop as a dollar distance, multiply by $100 per lot, then divide.
- In the 12:00 to 14:00 UTC window, which holds about 36% of all Dolvero breach events, halve the size or stand aside. The News Trading rule already keeps you out of the 30 minutes around every high-impact event unless you hold the News Trading add-on.
- Count the day, not the trade. Set a number of losses after which the platform is closed, and let the calculator tell you what that number is at your size.
Sizing on a trailing model
On the 1-Step and on Instant Funding the maximum drawdown floor follows your best result. The room to the floor is the full percentage right after a new high and nothing more, so the "losses until the drawdown floor" figure resets every time the account makes a new high. The practical rule is the opposite of what feels natural: after a strong run, cut size, because the cushion you built has just been converted into a higher floor. On the 2-Step the floor is static, so profit becomes cushion and a trader who is up 5% can keep the same size with fifteen losses of 1% in hand instead of ten. This difference is the reason the 2-Step tolerates the widest sizing of the three models, and the reason its parameters are the ones most traders compare when they choose a firm. The full explanation with worked examples is in Daily, Max and Trailing Drawdown Explained.
Where Dolvero stands out
- Live distance to limits
- Dashboardin dollars, on equity, in real time
- 2-Step daily and max
- 5% / 10%widest group in our comparison
- Static floor on 2-Step
- Never movesprofit becomes cushion
- Per-idea cap
- 2%No Risk Limit add-on removes it
- Time limit
- Nonesize for survival, not for a deadline
- Breach reviews
- Publishedevery disputed case, with the numbers
Frequently asked questions
What lot size should I use on a $100,000 prop firm challenge?
Lots = (account × risk %) ÷ (stop in pips × pip value per lot). At 1% risk and a 50-pip stop on EURUSD that is $1,000 ÷ $500 = 2.00 lots. At a 20-pip stop it is 5.00 lots, at 100 pips 1.00 lot.
How much should I risk per trade on a prop firm account?
Divide the daily loss limit by the number of losses you want one day to survive. On a 5% daily limit, 1% gives five, 2% gives two. On a 2% daily limit (Instant Funding), 0.5% gives four. The maximum drawdown then sets the number of bad days you can have in a row.
What is Dolvero's maximum risk per trade?
2% of the account per trade idea on 2-Step and 1-Step evaluations, measured across all positions that belong to the same idea. Instant Funding has no per-trade cap. The No Risk Limit add-on removes the cap on 2-Step and 1-Step; the daily and maximum limits remain.
How do I calculate lot size for gold (XAUUSD)?
One standard lot is 100 ounces, so a $1 move in the gold price is $100 per lot and a 0.10 move is $10. Take your stop in dollars of price, multiply by $100 to get the loss per lot, and divide your risk in USD by that. $1,000 risk with a $5 stop is $1,000 ÷ $500 = 2.00 lots; with a $20 stop it is 0.50 lot.
Does the daily loss limit count open positions?
Yes. Dolvero measures the daily loss limit and the maximum drawdown on equity, so the floating loss of every open position counts at every moment. Three open trades each risking 1% are 3% of exposure, and the dashboard shows the live distance to the limit with all of them included.
Size it once, see it live
The Dolvero dashboard shows the distance to the daily limit, the drawdown floor and the per-idea cap in dollars on every account, so the numbers from this calculator are checked for you in real time. The rules page has the full parameters for each model.
- Dolvero: Trading rules and FAQ (daily loss limit, maximum drawdown, trailing definitions, 2% cap per trade idea, News Trading and No Risk Limit add-ons), account configuration for each model
- Dolvero: Transparency page and internal enforcement data as of 10 September 2026 (share of breached accounts by rule, breach timing by hour, instrument frequency, anonymised examples)
- Competitor daily loss and maximum drawdown parameters used for the "widest group" comparison: official pages linked in Prop Firm Rules Compared 2026
- Pip and point values: derived arithmetically from standard contract sizes (100,000 units of base currency for forex pairs, 100 troy ounces for XAUUSD, 1 contract for US30, 1 BTC for BTCUSD); confirm the contract size in your platform's instrument specification
