Before you ask where to enter, decide how much you are willing to lose if you are wrong. Position size is then just arithmetic. This guide uses the convention most retail brokers use for gold:
- 1 pip = $0.10 of price movement on XAUUSD, so $1 = 10 pips.
- 1 standard lot = 100 ounces.
- So with 1 lot, a 1-pip move ($0.10) is worth $10.
Measuring your stop in pips
If you buy at 4024.0 and your stop is at 4016.0, the distance is $8.0, which is 80 pips. That distance comes from the chart, from where your idea is invalidated, for example just below the order block. Never shrink a stop just to trade bigger.
The formula
- Risk in dollars = account balance × risk %.
- Value per pip needed = risk in dollars ÷ stop in pips.
- Lots = value per pip ÷ $10 (the value per pip of 1 lot).
Or in one line: Lots = (Balance × Risk%) ÷ (Stop pips × 10).
Worked example
Balance $10,000, risk 1%, stop 80 pips.
- Risk = $10,000 × 1% = $100.
- Value per pip = $100 ÷ 80 = $1.25.
- Lots = $1.25 ÷ $10 = 0.125, rounded down to 0.12 lots.
If price hits the stop, you lose about $96 (0.12 × 80 × $10), slightly less than your $100 limit because we rounded down. Always round down.
Quick reference: lots for a $10,000 account at 1% risk
| Stop (pips) | Stop ($ move) | Lots | Loss if stopped |
|---|---|---|---|
| 40 | $4.0 | 0.25 | $100 |
| 80 | $8.0 | 0.12 | $96 |
| 120 | $12.0 | 0.08 | $96 |
| 200 | $20.0 | 0.05 | $100 |
Notice the pattern: a wider stop means a smaller position, so the dollar risk stays the same. That is the whole point.
Use the free calculator
Enter your balance, risk percentage and stop in pips. The calculator returns the dollar risk, the lot size and the value per pip, using the formula above.
Gold lot size calculator
XAU/USD · $1 = 10 pips · 1 lot = $10 per pip
Rounded down to 0.01 lots. Check your broker's contract size before you trade. A calculator for study, not a recommendation.
How much should you risk per trade?
Many experienced traders keep risk between 0.5% and 1% per trade. Prop-firm challenges often have daily loss limits of around 4–5% and total limits around 8–10%, so risking 2% or more per trade leaves very little room for a normal losing streak. Five losses in a row happen to every method.
Example for a small account
Many new traders start with $500 or $1,000. The same formula applies, but the numbers show why small accounts need small lots on gold.
Balance $1,000, risk 1%, stop 80 pips. Risk is $10. Value per pip is $10 ÷ 80 = $0.125. Lots = $0.125 ÷ $10 = 0.0125, so 0.01 lots after rounding down. At 0.01 lots, each pip is worth $0.10, and an 80-pip stop costs about $8.
Now compare that with someone who trades 0.10 lots on the same $1,000 account because "it is only a tenth of a lot". The same 80-pip stop costs $80, which is 8% of the account on one trade. Three normal losses and almost a quarter of the account is gone. Gold's daily range is often several hundred pips, so oversizing on this instrument is punished quickly.
Risk, reward and win rate
Lot size controls how much you lose when you are wrong. The distance to your target controls how much you make when you are right. If your stop is 80 pips and your target is the nearest liquidity 240 pips away, the trade offers three times the risk (3R). With setups like that, you do not need to win most of your trades to stay healthy, as long as every loss is the same planned size.
We do not move targets to fixed numbers like 2R. The target is the liquidity the chart points to; we measure in pips how far it is, and we only take the trade if the reward is worth the risk.
Lot size vs leverage
Leverage decides how much margin your broker holds for a position; it does not change how much you lose per pip. A 0.10-lot gold trade loses $1 per pip whether your account has 1:100 or 1:500 leverage. High leverage just makes it easier to open positions that are far too big. Size by risk, and leverage becomes almost irrelevant.
Partial profits and adding to positions
If you take half the position off at the first target, size the trade so that 0.01-lot steps make sense. With very small accounts, splitting 0.01 lots is impossible, so plan a single exit. Adding to a winning position should never increase your total risk beyond your planned percentage; move the stop first, then add.
Common sizing mistakes
- Using a fixed lot size whatever the stop distance.
- Moving the stop further after entry and keeping the same size.
- Forgetting spread and slippage around news.
- Confusing your broker's pip definition and sizing ten times too big.