Forex is commonly described as a 24-hour market, but trading conditions can change throughout the day as different financial centres become active. This guide maps the major forex sessions in GMT, explains how daylight saving time can shift their hours, and shows how session overlaps relate to currency-pair activity, liquidity, spreads and volatility.
A session overlap can bring more market participants into some currency pairs, but it does not automatically create higher volatility, tighter spreads or a trading opportunity. Session timing is best used alongside live market conditions, scheduled economic events and your own risk limits.
Quick summary
- The four commonly referenced forex sessions are Sydney, Tokyo, London and New York.
- Sydney, London and New York change their clocks seasonally, while Tokyo does not observe daylight saving time.
- A session overlap occurs when two regional sessions are active at the same time.
- London–New York is a major overlap for pairs involving currencies such as USD, EUR and GBP, but increased participation does not guarantee greater volatility or lower spreads.
- Liquidity, spreads and volatility measure different aspects of market conditions and should be assessed separately.
- Use GMT as your reference clock, then convert the relevant session or overlap to your local time for the specific trading date.
What are the major forex sessions in GMT?
A forex session is a practical label for the hours when a regional financial centre is most active. It is not a separate exchange opening bell because forex is an over-the-counter market. The exact availability of an instrument also depends on the provider and its trading specifications.
The table below uses widely used, approximate local-session conventions for planning and education. It does not represent Deriv dealing hours. Check the live trading specifications for the instrument you intend to trade.
Tokyo does not observe daylight saving time. Sydney, London and New York do, but Australia, the UK and the US do not change their clocks on the same dates. As a result, familiar overlap windows can temporarily shift by an hour during parts of the year.
When do forex sessions overlap?
A forex-session overlap occurs when the conventional trading hours of two financial centres coincide.
Using the session conventions above, the main overlaps include:
These windows are approximate rather than fixed year-round. Daylight-saving changes can move Sydney, London and New York by one hour in GMT, and their changeover dates do not align.
An overlap can increase participation in currencies connected with the active regions. However, more participants do not necessarily mean a large price move. Economic releases, unexpected news, market sentiment and available liquidity can have a greater effect on volatility than the session label itself.
How do I convert forex session times?
GMT is a useful shared reference because it does not change seasonally. Your local time may change, so use the GMT offset that applies in your location on the specific date you plan to trade.
For example, if an overlap runs from 13:00 to 17:00 GMT, it begins at 13:00 in a GMT+0 location, 15:00 in a GMT+2 location and 08:00 in a GMT−5 location.
Use this routine:
- Choose the date you want to observe or trade.
- Check whether Sydney, London and New York are on standard or daylight-saving time.
- Identify the relevant session or overlap in GMT.
- Convert that GMT window using your local offset for that date.
- Check the instrument schedule for public holidays, early closes or other changes.
Avoid copying one fixed session timetable into your calendar for the entire year. Clock changes can alter the GMT boundaries even when the underlying local-market convention remains the same.
Which currency pairs are active during overlaps?
The currencies associated with active financial centres may attract more regional participation and relevant news flow during an overlap. This does not mean that a pair will necessarily be volatile, liquid or suitable for a particular strategy.
Which pairs are active during Sydney–Tokyo?
AUD/USD, AUD/JPY, NZD/USD, NZD/JPY and USD/JPY are commonly observed during the Asia-Pacific sessions.
AUD/JPY, for example, connects the Australian dollar with the Japanese yen while both Sydney and Tokyo are active. AUD and NZD pairs can react to Australian and New Zealand developments, while JPY pairs can respond to Japanese data and broader market sentiment.
Liquidity for some globally traded pairs may be lower than during the London–New York overlap. Check the live bid–ask spread rather than assuming it will be narrow.
Which pairs are active during Tokyo–London?
The Tokyo–London overlap is generally a shorter handover between Asian and European trading hours. EUR/JPY and GBP/JPY directly connect European currencies with the Japanese yen, while EUR/USD and GBP/USD may attract increasing attention as London activity begins.
Scheduled economic releases or changes in market sentiment can still matter more than the overlap itself.
Which pairs are active during London–New York?
EUR/USD, GBP/USD, USD/JPY, USD/CHF, USD/CAD and EUR/GBP are commonly watched when London and New York are both active.
EUR/USD and GBP/USD connect currencies associated with the European or UK trading day to the US dollar while both major financial centres are active. USD pairs can also react quickly to scheduled US economic releases.
Higher participation may support deeper trading interest, but important news can simultaneously produce rapid price changes and changing spreads.
How do liquidity, spreads and volatility differ?
Liquidity, spread and volatility are related to market conditions, but they measure different things.
- Liquidity describes how readily buyers and sellers can transact at available prices. Greater participation can make entering or exiting easier, but it does not eliminate execution risk.
- Spread is the difference between the bid price and ask price. It forms part of the cost of trading and can change as market conditions change.
- Volatility describes the size and speed of price movements. It can increase around economic releases, unexpected events, session transitions or periods of thinner liquidity.
An overlap can coincide with relatively strong liquidity while volatility remains modest. Conversely, an economic release can produce high volatility and changing spreads while two major sessions are open.
Assess each factor separately rather than assuming that a busy session produces favourable conditions.
Deriv defines the minimum spread as the lowest bid–ask spread achievable under ideal conditions and provides trading hours by instrument. A minimum spread does not guarantee the spread available at a particular moment. Review the current trading specifications before trading.
How should I choose a forex session?
There is no universally suitable forex session. Start with your availability and the currency pair you want to observe, then assess current conditions.
Use this sequence:
→ Choose a currency pair
→ identify its relevant sessions
→ check the overlap and daylight-saving status
→ review scheduled economic events
→ inspect the live spread
→ confirm instrument trading hours
→ assess the potential risk.
If your available trading time falls within a quieter session, you do not need to force a trade. You can observe how the pair behaves or practise using a demo account.
Similarly, choosing a session because it is busier does not remove risk. Greater activity can coincide with faster price movements or changing transaction costs.
How do I check live forex trading hours?
Forex products are generally offered on Deriv 24/5, but individual instruments can have their own schedules, daily breaks and other specifications. Check the live trading specifications, particularly around public holidays, early closes and weekend boundaries.
For an introduction to the available forex markets and instruments, see Forex on Deriv.
Availability, leverage and trading conditions vary by jurisdiction, account and instrument. Regional links, disclosures and any relevant holiday notices should be confirmed through the appropriate Deriv product, legal or compliance review before publication.
Things to remember
- A session overlap means two regional trading sessions are active at the same time.
- An overlap does not guarantee higher volatility, tighter spreads or a particular price direction.
- Sydney, London and New York change their clocks seasonally; Tokyo does not.
- Plan using GMT first and convert to your local time for the specific date.
- Check scheduled economic events, live spreads and instrument availability before acting.
- Demo trading can help you observe how a pair behaves across different sessions, but demo results do not guarantee equivalent live-trading outcomes.
Next step
Visit the Deriv forex market page to review available currency pairs. You can then use a demo account to compare the same pair across different sessions and overlaps.
Before placing a live trade, check the instrument's current trading specifications, including its listed trading hours.
Quiz
What does a forex-session overlap mean?
FAQs
