Forex Market Hours

The foreign exchange market has no opening bell and no closing bell. It is a network of banks, brokers and funds that hands the book from one part of the world to the next, and it runs continuously from Sunday evening in New York to Friday evening in New York — five days without a break. That handover is the whole idea behind “sessions”: nothing opens or closes, but the people who make the prices change desk.

By convention the week is bounded by 17:00 in New York. That is when the daily rollover happens, when swap is charged, and when most brokers roll the daily candle. In UTC that boundary is 21:00 while the United States is on daylight saving and 22:00 while it is not — which is exactly why this page never writes a UTC hour into the code and asks the time zone instead.

The four centres

Sydney starts the week. It is the thinnest of the four: the Australian and New Zealand dollars get their cleanest domestic flow here, and everything else drifts. Tokyo follows and largely overlaps it, bringing the yen crosses to life along with Chinese and broader Asian data. London is the largest centre in the world by turnover, and its open is the single biggest step-change in activity of the day — the European session sets the tone for the euro, sterling and the Swiss franc. New York comes last, brings the American data calendar with it, and hands what is left back to Sydney a few hours later.

The hours in the table above are the local working day of each city — 8:00–17:00 in Sydney, London and New York, and 9:00–18:00 in Tokyo. They are a description of when there are people at desks, not a rule about when you are allowed to trade: a EUR/USD order placed at 03:00 UTC will still be filled, it will simply be filled in a thinner book, often at a wider spread.

Why the London–New York overlap matters

For roughly four hours a day, the two largest centres on earth are open at the same time. Both books are staffed, both sets of client flow are live, and the American data releases — the ones that move currencies most — land inside that window. The consequence a trader feels is simple: spreads are usually at their tightest and ranges at their widest. The measurement above is not an opinion about it: over the window we last measured, 22 of the 29 markets we track had their single busiest hour of the day inside that overlap, and 29 of 29 had their quietest hour after it had closed.

The length of the overlap is not fixed at four hours. Europe and the United States change their clocks on different dates: the United States moves in early March and early November, Europe on the last Sundays of March and October. For about four weeks a year — three in spring, one in autumn — the two are out of step, and the overlap stretches to five hours. In the northern winter a fourth overlap appears entirely: with Sydney on southern-hemisphere summer time and New York on standard time, the Sydney desk opens an hour before New York finishes. Both cases are why the list on this page is computed from real time zones every time the page is served.

The hourly profile is a median, and a median is a deliberately boring statistic: half the candles in that hour were bigger, half were smaller. It is not an average, so a single central-bank day cannot inflate it, and it is not a maximum, so it does not describe what happens when something breaks. Read it as the shape of a normal day.

Three things it does not say, and the mistakes that follow from assuming it does:

• A busy hour is not a profitable hour. Range is movement in both directions. The overlap produces the widest hours and also the most reversals; more range means a bigger reward if you are right and a faster stop if you are wrong. Nothing in this measurement has an opinion about direction — for that there are the trading signals and the AI daily forecast.
• A quiet hour is not a safe hour. Thin books slip. Over the window above, EUR/USD’s quietest hour was 4.0 pips at 20:00 — and that means the typical candle is small, not that the spread is small or that a stop will be filled where you put it. The rollover hour around the New York close is the clearest example: almost nothing trades, spreads widen sharply, and stops get taken at prices that never appear on the chart afterwards.
• A typical hour is not tonight’s hour. The profile is measured over past weeks; a scheduled release rewrites it completely for the hour it lands in. Check the economic calendar before assuming an ordinarily quiet hour will stay quiet, and read the volatility page for how wide each market’s range is at the moment, which is a different question from how it is distributed across the day.

What it is genuinely good for

Three things. Choosing when to sit down: if your strategy needs movement to work, the profile tells you which two or three hours of your own day supply it, and which hours are a waste of attention. Sizing a stop: a stop that is comfortable in the London morning can be inside the noise at 21:00 UTC, and vice versa — if you size from a distance rather than a level, the hour matters. And setting expectations for an intraday target: a target that needs several times an hour’s typical range to be reached is a target that usually needs the next session to turn up first.

The numbers come from the same hourly candles that feed the rest of the site, and no extra data is fetched to build them. They are rebuilt from a rolling window of recent weeks, and the window is printed above the chart every time, so you can always see exactly which period you are looking at — and the page says so plainly when that window stops moving.

• Forex trading hours: when forex markets are open — the long-form version of the four sessions and the 24/5 week.
• Forex trading hours: when to avoid trading — the thin hours, the rollover, and why an empty book is its own risk.
• Best times for high market volatility — how session structure and the data calendar combine.
• The 4 p.m. London fixing — a single minute inside the overlap that behaves like nothing around it.
• Volatility analysis — the current ATR of each of the 29 markets, in its own unit.
• Lot size calculator — turn a stop distance into a position size once you have decided which hour to trade.

Jump back to the measured hours, the table of all 29 markets, or the overlap windows.