The forex market is open 24 hours a day on weekdays, but that does not mean every hour is worth trading. Prices are lively at some times and dead at others, and trading the quiet hours quietly drains your account through wider costs and false moves. This lesson shows you when the market actually moves, and why that matters for what you pay and what you catch.
01 The market follows the sun
There is no single forex exchange. Trading passes from one financial centre to the next as the working day opens around the globe, which is why it runs around the clock from Sydney's open on Monday morning to New York's close on Friday evening. It is usually split into four sessions named after their main hubs: Sydney, Tokyo, London and New York.
02 The overlaps are where the action is
Sessions do not just hand over cleanly, they overlap, and the overlaps are when two big centres trade at once. The most important is the London and New York overlap in the early afternoon London time. Volume surges, prices move further and faster, and this is when many traders do most of their work. The Tokyo and London handover is a smaller pickup. The dead zone is late in the New York session after London has gone home, when majors can drift for hours.
03 Why the timing matters to you
Two practical reasons. First, cost. Spreads tend to be tightest when a pair's home markets are open and busy, and they widen in thin hours such as the gap between New York's close and Tokyo's open. Trading a major during a quiet stretch can quietly cost you more per trade. Second, movement. A strategy that needs price to travel will struggle in a flat session, while a range strategy may prefer the calm. Match your trading to the pair and the hour rather than fighting them. As a rough guide, the euro and pound pairs are liveliest during London, and the yen pairs during Tokyo.
Trading whenever you happen to be free, then blaming the strategy. If you can only trade at a dead hour for your pair, either switch to a pair whose session is live then, or accept that you are trading the hardest conditions. Timing is a free edge that costs nothing to use.
- Which overlap is usually the busiest of the day?
- When are spreads on the majors likely to be widest?
- Which session tends to be liveliest for yen pairs?
Show answers
1) London and New York. 2) In the thin hours around the New York close and before Tokyo opens. 3) Tokyo.
- Forex runs 24 hours on weekdays through four sessions: Sydney, Tokyo, London and New York.
- The London and New York overlap is the busiest window, with the most movement.
- Timing affects both your spread and how far price travels, so match your trading to the pair and the hour.
It opens with the Sydney session early on Monday morning local time and trades continuously until the New York close on Friday evening. In GMT terms it is effectively open from Sunday evening to Friday evening.
For most beginners the London session and the London to New York overlap offer the best mix of movement and tight spreads on the major pairs. The best session ultimately depends on which pairs you trade and when you can be at the screen.
Spreads reflect how many buyers and sellers are active. In quiet hours, such as between the New York close and the Tokyo open, there is less activity, so brokers widen the spread. Busy sessions bring tighter spreads.
Further reading: OTC foreign exchange turnover in April 2025, the Bank for International Settlements survey showing which centres dominate each session.
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