Volatility and Session Behaviour

Gold trades around the clock — but not evenly

XAU/USD runs almost continuously from Sunday evening to Friday evening, but the volume is wildly uneven. The practical split:

• Asia (roughly 23:00–08:00 UTC): thinnest liquidity. Range-bound, prone to stop-hunting wicks. Physical demand from China and India flows here, which can produce slow directional drift rather than volatility.
• London (07:00–16:00 UTC): the real start. European participation, the LBMA auction, and the beginning of the US overlap. Trends often begin here.
• New York (12:00–21:00 UTC): the highest volume and the largest share of the daily range. US data releases land here, and so does the bulk of futures volume.

Why session volatility matters more than daily ATR

If you size a stop from a daily ATR, you are averaging across sessions with three or four times the volatility spread. The result is a stop that is too tight for New York and unnecessarily wide for Asia.

Worse: if you place a trade during the Asian session using an ATR-derived stop, you are implicitly assuming the range that is about to arrive. When London opens, the range expands, and your stop is inside it. You get stopped out on noise and then watch the trade go your way.

How to use it

• Measure the average range per session, not just per day.
• Size stops for the session you expect to be holding through — if you are holding into New York, use the New York range.
• Expect the London open and the US data window to be where stops get taken. If your stop is within one session ATR of entry, it is a coin flip.
• Be wary of entering during Asia with a tight stop: you are paying the spread in the thinnest liquidity for a position that will be tested in the thickest.

How to check this yourself

Take one week of gold candles and write down the high-to-low range for the Asian session, the London session, and the New York session separately. Compare each against the daily ATR your platform displays. You will almost certainly find one session that routinely moves more than the daily average implies — and that is the session your stop was never sized for.