What are forex trading sessions?
The foreign exchange market has no central exchange and no opening bell. It runs around the clock from Sunday evening to Friday evening because trading passes from one financial centre to the next as the day moves west: Sydney opens first, then Tokyo, then London, and finally New York. A "session" is simply the working day of the dealing desks in that centre.
You can place an order at any hour, but who is on the other side of it changes completely through the day. According to the Bank for International Settlements (BIS) triennial survey, London alone handles roughly a third of global FX turnover, with New York second. That is why the hours when those two centres are both at work matter more than any other part of the day.
Session hours in UTC
Every session opens at the same local hour all year. What moves is the gap between that centre and UTC, because Europe, the US and Australia observe daylight saving on different dates. The two states you will see for most of the year:
| Session | UTC — Europe/US summer time | UTC — Europe/US winter time |
|---|---|---|
| Sydney | 21:00 – 06:00 | 20:00 – 05:00 |
| Tokyo | 00:00 – 09:00 | 00:00 – 09:00 |
| London | 07:00 – 16:00 | 08:00 – 17:00 |
| New York | 12:00 – 21:00 | 13:00 – 22:00 |
The overlaps that matter, also in UTC: London – New York runs 12:00 – 16:00 in summer and 13:00 – 17:00 in winter; Tokyo – London is a short 07:00 – 09:00 (08:00 – 09:00 in winter); Sydney – Tokyo covers 00:00 – 06:00 (00:00 – 05:00 in winter).
⚠️ This table is a simplification. Australia switches in the opposite direction to Europe, and the switch dates in Europe, the US and Australia are weeks apart — in those weeks the real schedule matches neither column (around mid-March the London – New York overlap stretches to five hours). The timeline at the top of this page is the accurate one: it computes from the actual date, in whichever time zone you pick.
The London–New York overlap in your city
The single most useful window of the day, converted to local time in major trading cities. Pick your city, or set your own time zone in the tool above for every session, not just this one:
| City | Local time — Europe/US summer | Local time — Europe/US winter |
|---|---|---|
| London | 13:00 – 17:00 | 13:00 – 17:00 |
| Frankfurt | 14:00 – 18:00 | 14:00 – 18:00 |
| Johannesburg | 14:00 – 18:00 | 15:00 – 19:00 |
| Dubai | 16:00 – 20:00 | 17:00 – 21:00 |
| Mumbai | 17:30 – 21:30 | 18:30 – 22:30 |
| Singapore | 20:00 – 00:00 | 21:00 – 01:00 |
| Hong Kong | 20:00 – 00:00 | 21:00 – 01:00 |
| Tokyo | 21:00 – 01:00 | 22:00 – 02:00 |
| Sydney | 22:00 – 02:00 | 00:00 – 04:00 |
| New York | 08:00 – 12:00 | 08:00 – 12:00 |
| São Paulo | 09:00 – 13:00 | 10:00 – 14:00 |
Read it as a rough guide to where the window lands in your day: an afternoon block for Europe and Africa, the morning for the Americas, and the evening or late night for Asia and Australia. Cities that observe their own daylight saving — Sydney, São Paulo — move by an hour on their own dates, so the timeline above is the reliable source in transition weeks.
Which hours are best to trade?
Not every hour is equal. When two sessions overlap, far more participants are active, order books deepen and spreads usually tighten — so each trade costs you less to execute. That is why the activity bar at the top of the page is worth a glance before you enter.
- London – New York (12:00 – 16:00 UTC in summer, 13:00 – 17:00 in winter) is the busiest window of the day and carries the bulk of daily volume. US economic releases at 12:30 or 13:30 UTC land inside it.
- Tokyo – London (07:00 – 09:00 UTC) is the Asia-to-Europe handover: volatility picks up and the Asian range is often broken here.
- Sydney – Tokyo (00:00 – 06:00 UTC) is the Asian session: usually calmer, with narrower ranges — better suited to range trading than trend following.
One thing worth saying plainly: the "best" hour is the one that fits how you trade, not the most volatile one. Scalpers need depth and tight spreads, so they pick the overlaps; range traders prefer the quieter Asian session; and if you hold positions for days, your entry hour barely matters.
Summer and winter hours — why the schedule shifts
Financial centres open at 8am their own time all year. What changes is the distance between their clock and yours. The UK and EU move to summer time on the last Sunday in March and back on the last Sunday in October; the US starts on the second Sunday in March and ends on the first Sunday in November; and Australia runs the other way, because its summer is the northern hemisphere's winter. Japan, China, India, Singapore and the Gulf do not observe daylight saving at all.
In practice this means the London and New York sessions arrive an hour later in UTC from late October to mid-March, and an hour earlier the rest of the year. Sydney does the opposite. Tokyo is the only major session that never moves. The tool above handles all of it — there is no mental arithmetic to do.
When is the market thinnest?
The forex market runs continuously, but there is a stretch of every day when little more than Sydney — the smallest of the four centres — is open: roughly 21:00 – 00:00 UTC in the northern summer and 22:00 – 00:00 UTC in winter, after New York closes and before Tokyo comes in.
Liquidity is thin there, spreads widen, and price can jump on a single large order. If you leave pending orders or tight stops sitting close to price, this is when they are most likely to be taken out. Many professionals simply do not open new positions in that window. Daily broker rollover, when swap is charged, also falls at the New York close.
Which pairs suit which session?
A pair is usually most active while the financial centre behind its currency is open. A quick way to pair them up:
| Session | Most active | Character |
|---|---|---|
| Sydney / Tokyo | AUD/USD, NZD/USD, USD/JPY, AUD/JPY | Narrow ranges, often sideways |
| London | EUR/USD, GBP/USD, EUR/GBP, XAU/USD | High volatility, sets the daily trend |
| New York | USD/CAD, USD/JPY, EUR/USD, XAU/USD | Reacts to US economic data |
Gold (XAU/USD) is a special case: it barely moves through the Asian session, opens up once London is in, and is strongest across the London – New York overlap.
What are killzones, and when do they fall?
Killzone is a term from the ICT school for the narrow windows at the start of the London and New York sessions — when institutional order flow is heaviest and price often reverses or runs stops. They are defined in New York time, so in UTC they shift with US daylight saving:
- London Killzone — 02:00 – 05:00 New York time, i.e. 06:00 – 09:00 UTC in the US summer and 07:00 – 10:00 UTC in winter.
- New York Killzone — 07:00 – 10:00 New York time, i.e. 11:00 – 14:00 UTC in the US summer and 12:00 – 15:00 UTC in winter.
These are one school's convention, not hours published by any exchange. Their value is that they force you to trade inside a liquid window instead of entering at random all day — the label itself does not make a trade win.
Weekend gaps: why price jumps at the Sunday open
The market closes when New York finishes on Friday — around 21:00 UTC in summer, 22:00 UTC in winter — and reopens when Sydney comes in on Monday morning its time, which is Sunday evening in UTC. Exact cut-off times vary slightly by broker. Across those two days news still happens: elections, central bank remarks, geopolitical events. Price cannot react gradually, so it jumps in one step at the reopen — that is a gap.
This matters directly for risk management: a stop-loss does not protect you across a gap, because it fills at the reopening price, not the price you set. If you hold over the weekend, size down accordingly — or close before the market rests.
Bank holidays thin the market out
The session hours on this page describe a normal week. When a financial centre is on holiday, that session is close to empty: volume drops, spreads widen, and volatility disappears even though quotes keep streaming. The ones that matter most: Christmas and New Year's Day (nearly everywhere), Good Friday and Easter Monday (UK and Europe), Thanksgiving (US, fourth Thursday of November), US Independence Day, the UK bank holidays in May and August, Golden Week (Japan, early May) and Lunar New Year (China, Hong Kong, Singapore). A US or UK holiday alone is enough to flatten the London – New York overlap for the day.
How do trading hours affect your costs?
Spreads widen when the market is thin — early in the Asian session, or right after New York closes. Entering then means paying more for the same trade. Picking a liquid window lowers your cost without changing your strategy.
There is one more cost most traders overlook: the spread and commission you have already paid your broker. Whatever hour you trade, part of that comes back to you as a rebate through Backcom.io — and for an active trader, the yearly total dwarfs the spread difference between one window and another.
