Forex is often sold as a "24-hour market," and technically that is true: from the Sunday evening open in Asia-Pacific to the Friday afternoon close in New York, there is always a bank somewhere quoting a price. But a market that is open is not the same as a market that is active. Liquidity, spreads and the size of typical moves change dramatically through the day, and a strategy that works at 13:30 UTC can quietly bleed money at 03:00 UTC. Understanding the sessions is one of the cheapest edges available to a retail trader, because it costs nothing but attention.
The four sessions, in plain terms
FX trading is usually described in terms of four regional sessions. The exact hours vary by source because there is no official bell; these are approximate windows in UTC.
| Session | Approx. hours (UTC, northern-hemisphere winter) | Character |
|---|---|---|
| Sydney | 21:00 to 06:00 | Thinnest liquidity; the week's open; AUD and NZD news |
| Tokyo | 00:00 to 09:00 | JPY, AUD, NZD and China-linked flows; often range-bound for European pairs |
| London | 08:00 to 17:00 | The largest share of global FX turnover; EUR, GBP and CHF data |
| New York | 13:00 to 22:00 | US data and Fed communication; the 16:00 London fix; the daily close |
London is the single biggest FX centre by turnover, which is why so many pairs "wake up" when European desks arrive. New York is the other heavyweight, and the overlap between the two is where most of the day's volume tends to concentrate.
Why the overlaps matter more than the sessions
The handover periods are where the interesting things happen. When Tokyo hands over to London, the Asian range is often tested, and many intraday traders watch whether the European open breaks that range or rejects it. The London and New York overlap (roughly 13:00 to 17:00 UTC in winter) combines the two deepest pools of liquidity and is when major US releases land. Spreads on the majors are usually at their tightest here, and moves are usually at their largest.
That combination is a double-edged sword. Tight spreads lower your cost per trade, but bigger moves mean your stop distance needs to reflect the volatility of the hour you are trading, not the average of the whole day. If you size positions with a fixed stop in pips, a stop that is comfortable in the Asian session may be noise in the New York morning. We covered sizing mechanics in Position Sizing and Risk Per Trade, and the same logic applies here: let the stop come from the market structure, then let the position size come from the stop.
The quiet hours are not free
Late New York into the Sydney open (roughly 21:00 to 23:00 UTC) is the thinnest stretch of the trading day. Banks are rolling positions, liquidity providers widen their quotes, and retail platforms frequently show spreads several times wider than normal. Stops placed close to the market can be triggered by a spread widening rather than by any genuine price move. If you hold positions overnight, it is worth checking what your broker's spreads look like around the daily rollover before you find out the hard way.
The Sunday open deserves its own mention. Weekend news (elections, geopolitical events, policy announcements) gets priced in all at once when trading resumes, and the first quotes of the week can gap well away from Friday's close. A stop-loss order does not protect you at the stop price in a gap; it becomes a market order and fills at the first available price.
Daylight saving: the autumn trap
Here is the detail that catches people every year. Europe and North America do not change their clocks on the same weekend. In 2026, the UK and EU move back an hour on Sunday, October 25, while the US and Canada move back on Sunday, November 1. For that one week, the gap between London and New York is an hour shorter than usual, so the overlap and the timing of US releases relative to the European session both shift.
If you trade from Canada, your local clock moves on November 1, but European data will already have shifted a week earlier. Calendar sites usually adjust automatically to your chosen time zone; your own written routine probably does not. A quick review of your trading plan's times before each clock change is a small habit that prevents a lot of "why did nothing happen at my usual time?" confusion.
Matching pairs to sessions
A useful starting principle is that a currency tends to be most active when its home market is open and when its own data is released. Some general patterns, which are tendencies rather than rules:
- EUR/USD and GBP/USD typically do most of their work between the London open and the end of the New York morning.
- USD/JPY is active in Tokyo but often makes its larger moves on US data and US yields during New York hours.
- AUD/USD and NZD/USD respond to domestic data and to China releases during the Asian session, as Monday's China GDP data showed again this week.
- USD/CAD is driven heavily by North American hours, Canadian data at 08:30 Eastern, and the oil market.
- Crosses such as EUR/GBP can be very quiet outside European hours, with spreads that reflect it.
A practical exercise
Rather than trusting any table (including this one), measure it yourself. Take a pair you trade and, for the last few months of hourly data, calculate the average high-to-low range for each hour of the day in UTC. Plot it. You will almost certainly see a clear shape: a trough in late New York, a rise into the London open, and a peak around the US data window. Then compare your own trade log against that shape. If your journal (see How to Keep a Trading Journal That Actually Improves Your Trading) records entry times, you can check whether your best and worst trades cluster in particular hours.
Many traders discover that a large share of their losses come from trades taken out of boredom in quiet hours, where there was no real reason for price to move toward their target. Others find their strategy only works in the overlap. Either way, it is information you can act on.
Key takeaways
- The market is open 24 hours, but liquidity and volatility follow a predictable daily rhythm.
- The London and New York overlap usually offers the tightest spreads and largest moves; the late New York and Sunday open periods offer the widest spreads and gap risk.
- Clock changes in Europe and North America happen on different weekends; review your schedule in late October and again in March.
- Measure session behaviour on the pairs you trade instead of relying on generic tables.
This article is general education, not investment advice. Hours shown are approximate and illustrative; check your broker's actual trading hours and spreads.