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How to Trade XAU/USD: The Mechanics of Spot Gold

Wooden blocks spelling XAU with green and red arrows, the ticker for spot gold

XAU/USD is quoted like a currency pair and traded on the same platforms, which leads a lot of people to trade it like one. It is not one. Gold has no central bank, no interest rate, and no economy behind it, and the things that move it are not the things that move EUR/USD.

Getting the mechanics right first — contract size, what a point is worth, when liquidity actually exists — prevents most of the expensive surprises.

What you are actually trading

Spot gold is quoted as US dollars per troy ounce, which is 31.1 grams rather than the 28.3 grams of an ordinary ounce.

The standard contract is 100 troy ounces. That means a one-dollar move in the gold price is worth $100 per standard lot, and a $10 move — an ordinary day — is $1,000.

Gold is measured in points, not pips, and this is where accounts get damaged. Applying forex pip arithmetic to gold inflates every distance by a factor of ten thousand: a stop 5 dollars away is 5 points, not 50,000 pips. Platforms that display gold in pips are applying a convention borrowed from currencies to an instrument that does not use it. Read the distance in dollars and multiply by 100 per lot.

Practical consequences:

  • Gold routinely moves 1% to 2% in a day, and 3% to 5% in a crisis. On a standard lot that is thousands of dollars.
  • Spreads widen far more than in major currency pairs — often from 20 or 30 cents in liquid hours to a dollar or more in thin ones.
  • Overnight financing applies on leveraged spot positions, and on gold it is usually a cost on both sides, not just the short one.

The dollar relationship, and when it fails

Gold is priced in dollars, so a stronger dollar makes it more expensive in every other currency and demand falls. That gives an inverse relationship with the dollar index which is genuine but weaker and less stable than commonly claimed. Over long windows it typically runs somewhere in the −0.3 to −0.6 range, tightening in some regimes and disappearing in others.

It breaks completely in a crisis, and the direction of the break is the useful part. In a genuine flight to safety, both gold and the dollar are wanted, and both rise. Anyone short gold on the theory that a strong dollar must push it down has been carried out by this more than once.

The more reliable driver over months and years is real interest rates — nominal yields minus expected inflation.

Gold pays nothing. Holding it means giving up the yield on a government bond, and that forgone yield is its carrying cost. When real rates are high, the cost is high and gold struggles. When real rates fall or go negative, holding gold costs nothing or less than nothing, and it performs.

The 2020 to 2021 period is the clearest illustration: policy rates at zero with inflation running several points above them meant deeply negative real yields, and gold ran from around $1,500 to above $2,000.

If you follow one series alongside the gold chart, make it the inflation-protected government bond yield rather than the dollar index.

When liquidity actually exists

Gold trades around the clock from Sunday evening to Friday evening, but the market is a different animal in each session.

Asian hours are the quietest, with typical ranges of a few dollars. China is the largest producer and, with India, among the largest consumers, so Chinese demand data and policy news can matter — but the depth is thin and moves are easily reversed.

London is the centre of the physical bullion market, and liquidity improves sharply when it opens. Ranges widen and the price starts to respect technical levels properly.

New York brings the futures market and the highest volatility, particularly around data releases.

The window that matters is the London–New York overlap: roughly 1pm to 4pm London time, 8am to 11am in New York. Liquidity is deepest, spreads are tightest, and moves are more likely to be directional rather than noise. If your schedule allows only two or three hours of screen time, this is the block worth using.

The scheduled events that reprice gold in seconds are the US inflation release, the monthly employment report and Federal Reserve decisions — all of which work through the real rate channel. They sit on our economic calendar with consensus figures, which is what you need to judge whether a number is a surprise.

Gold as a haven: the part that is misremembered

Gold is the reference safe haven asset and it does the job over weeks and months. Over the first forty-eight hours of a crisis it frequently does the opposite, and this catches people out repeatedly.

In a liquidity event, investors facing margin calls sell what they can, not what they want to. Gold is extremely liquid, which makes it among the first things sold. In March 2020, as equities fell sharply, gold fell too — around 12% from its February level — before recovering strongly over the following months.

Contrast that with the Russian invasion of Ukraine in February 2022, a geopolitical shock without a systemic funding squeeze. Gold gained roughly 8% within two weeks while equities fell.

The distinction is whether the crisis involves a scramble for cash. If it does, gold is collateral before it is a haven. The practical rule that follows: after a shock, gold typically spikes, pulls back on profit-taking, and then trends if the situation persists. Entering on the pullback has a considerably better record than chasing the spike.

Correlations worth checking

Silver correlates around +0.85 with gold and moves roughly one and a half times as far. That makes it a useful confirmation: if gold breaks a level and silver does not follow, the break is suspect. It also makes silver a different risk — the same notional exposure is a bigger position. Silver's industrial demand means it does not always behave like a precious metal at all.

Equities show a moderate inverse relationship, typically in the −0.4 to −0.6 range, which weakens or inverts in periods when both are being driven by liquidity rather than by risk appetite. There have been long stretches where gold and stocks rose together.

Oil has a weak positive correlation, driven by shared inflation expectations. Too weak to trade on.

Bitcoin has an unstable relationship that has ranged from zero to strongly positive. It is not usable as a signal.

Risk management, specifically for gold

The volatility is the constraint, and the arithmetic is unforgiving.

On a $10,000 account risking 1% — $100 — with a $50 stop, the maximum position is 0.02 lots. A single standard lot moves $100 for every dollar of price change, so a routine $100 daily range is a $10,000 swing. Position sizes that feel normal in currency pairs are catastrophic in gold.

Stops need room. Gold respects technical levels well because of its liquidity, but anything tighter than roughly $20 on a daily-timeframe trade will be taken out by ordinary noise. Place stops beyond structure — previous swing points, round numbers like 2,400 or 2,500 — with a buffer, and size the position to the stop rather than the other way round.

Weekend risk is real. Geopolitical news arrives when markets are closed, and Monday gaps of $50 to $100 are not unusual. A stop does not protect against a gap; it executes at the first available price. If there is live geopolitical tension, closing on Friday and reassessing on Monday costs a spread and removes the tail risk.

Three mistakes that recur

Trading a chart without checking the dollar. A textbook technical setup on gold means very little if the dollar index is running 3% on a hawkish Fed. Check the dollar and the direction of real yields before acting on a gold chart, every time.

Fighting the macro because gold "should" rise. Gold does not owe anyone anything. It falls for months in a rising real rate environment regardless of how much geopolitical risk is in the news. Wait for a confirmed turn rather than averaging into a trend.

Full size into an event. "The inflation print will lift gold, so I'll double up" ends with a whipsaw, several dollars of slippage and a stop filled at a price you did not choose. Event trading requires smaller size and wider stops, which is the opposite of what conviction suggests.

A commodity in a currency's clothing

Gold sits on a forex platform, quotes against the dollar and charts like a pair, and none of that makes it one. It has no yield, no issuer and no policy committee. Its price is a function of the opportunity cost of holding it, the dollar it is priced in, and how frightened people are — in roughly that order over long horizons, and in the reverse order during a crisis.

Trade the mechanics correctly, size for the volatility rather than the notional, watch real yields alongside the chart, and treat the first move in a crisis as noise rather than signal. Most of what goes wrong with gold trades is one of those four.

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