XAUUSD lot size: how much to risk on a gold trade

1. Why position size matters more than your entry

Two traders can take the same gold trade, with the same entry and the same stop loss, and have completely different results. One loses a small, planned amount. The other loses a large part of the account. The difference is position size: how many ounces of gold each of them controlled.

No entry method wins every time, so losses are part of trading. Sizing is how you decide in advance what a loss is allowed to cost. Many educators suggest beginners keep the cash risk on a single trade to a small fraction of the account, often 1% or less. That is a guideline for limiting damage, not a promise of any result.

2. What one lot of gold usually means

XAUUSD is the price of one troy ounce of gold in US dollars. At most CFD and forex brokers, one standard lot of XAUUSD is 100 ounces. That means 0.1 lot is 10 ounces and 0.01 lot, the smallest size many platforms allow, is 1 ounce.

With a 100-ounce lot, every $1 move in the gold price changes the value of 1 lot by about $100, 0.1 lot by about $10 and 0.01 lot by about $1. Some brokers use a different contract size, so open the symbol's specification in your platform and check it before you rely on these numbers.

3. Pips and points on gold: avoid the confusion

Gold prices are usually quoted to two decimal places, for example 2,350.25. Platforms, brokers and educators do not agree on what a pip or a point is on gold. Some call $0.01 a point and $0.10 a pip; others call $1 a pip. Mixing these up is one of the most common reasons beginners take a trade ten times bigger than they meant to.

A simpler habit is to measure your stop distance in dollars of price movement. If you plan to buy at 2,350.00 with a stop at 2,345.00, your stop distance is $5.00, whatever your platform calls it.

4. The lot size formula, with worked examples

Step 1: choose your cash risk. Step 2: measure your stop distance in dollars. Step 3: divide. Written out: lot size = cash risk ÷ (stop distance × ounces per lot). With a 100-ounce lot, you can also think of it as: number of 0.01 lots = cash risk ÷ stop distance.

Example A (hypothetical): the account is $2,000 and you choose to risk 1%, which is $20. Your stop is $5 away. Each 0.01 lot loses about $5 if the stop is hit, so $20 ÷ $5 = 4, giving a size of 0.04 lots. Check: 4 ounces × $5 = $20.

Example B (hypothetical): same account and same $20 risk, but the chart needs a $10 stop. Now $20 ÷ $10 = 2, so the size is 0.02 lots. A wider stop means a smaller position, which keeps the cash risk the same. If the stop you need would require less than your platform's minimum size, the trade is too big for the account and skipping it is a valid choice.

5. Spread, slippage and leverage

Your calculation is the plan, not a guarantee. The spread, the gap between the buy and sell price, is a cost you pay on every trade and can widen in quiet hours or around news. In fast markets your stop may also be filled at a worse price than requested, which is called slippage. Over a weekend, gold can open at a very different price from Friday's close.

Leverage lets you open a position with only part of its value as margin. It changes how much money must sit in the account to hold the trade, not how much you gain or lose per dollar of price movement. High leverage makes it easy to open a position far bigger than your plan, so let the formula, not the available margin, decide your size. Losses on leveraged products can exceed what you expected.

6. Why your stop distance changes through the day

Gold often trades in a narrower range during the Asian session and tends to move more around the London open and the London–New York overlap, though this varies from day to day. A stop that fits a quiet Asian range may be far too tight once London opens, and a stop sized for New York volatility shrinks the position you can take.

Before you size a trade, check which session is open and whether major US data is due. The free Gold Session Clock on tphits.com shows the Tokyo, London and New York sessions in your local time and adjusts for daylight saving automatically.

7. A simple pre-trade checklist

1. Where is my trade idea wrong? Put the stop there, not at a random distance. 2. How far is that in dollars? 3. How much cash am I prepared to lose on this one trade? 4. Divide to get the lot size and round down, not up. 5. Check the spread and the economic calendar. 6. Re-check the size in the order ticket before you press buy or sell.

Practising this on a demo account until it becomes automatic costs nothing. Our free gold course walks through reading the chart and placing a stop on real examples, with a short quiz at the end.