Gold, quoted as XAU/USD, is the price of gold in US dollars - a commodity that behaves differently from currency pairs, with larger ranges, safe-haven flows, and its own pip mechanics. Those differences mean a strategy that works on EUR/USD cannot simply be copied onto gold without testing.
What drives gold
Gold is a safe-haven asset. It tends to rise when investors are fearful, when real interest rates fall, and when the US dollar weakens - and it can fall hard when risk appetite returns. Because it responds to macro fear as much as to scheduled data, it can trend powerfully for weeks and then whip violently around events like FOMC and CPI. It is more about sentiment than any one country's rate decision.
Different pip mechanics
Gold does not use the four-decimal pip of a currency pair. It is priced in dollars and cents per ounce, with a much larger contract value per point, so the same-sounding "move" is a completely different dollar amount. This trips up traders who carry their forex pip-value intuition onto gold. A simulator that handles gold's contract size for you removes the guesswork - but you must respect that a "100 point" gold move is not a 100-pip forex move.
Size for the range, not out of habit: gold's large daily range means stops must be wider, so position size must be smaller to keep risk constant. Traders who size gold like a currency pair routinely take far more risk than they intend. Let the stop distance set the size.
How to backtest gold
Load XAU/USD into a simulator that models its contract size and spread, and run your setup across a large sample that includes both trending and choppy periods. Gold's behaviour changes with the macro backdrop, so test across different conditions - a strategy that shines in a fear-driven uptrend may fail in a quiet range. Watch how its volatility interacts with your stops, exactly as you would on Cable.
Respect gold's differences
Gold offers some of the cleanest trends in any market, but only to traders who size for its range and understand its drivers. Backtest it as its own instrument - not as a currency pair with a different name - and you can add a genuinely different, uncorrelated market to your toolkit.
Backtesting gold FAQ
What moves the price of gold (XAU/USD)?
Gold is a safe-haven asset. It tends to rise on fear, falling real interest rates, and a weaker US dollar, and fall when risk appetite returns. It responds to macro sentiment as much as to scheduled data.
How is backtesting gold different from a currency pair?
Gold has larger ranges, wider spreads, and different pip mechanics - it is priced in dollars per ounce with a bigger contract value per point, so a move worth the same number of points is a very different dollar amount.
Why do traders lose money sizing gold like forex?
Because gold's large range needs wider stops, and carrying a forex lot size onto gold takes far more risk than intended. Sizing must come from the stop distance and gold's contract value, not from forex habit.