The forex market runs 24 hours from Sunday evening to Friday evening (New York time). But not all hours are equal — volume, liquidity, and volatility vary dramatically across the trading day. Understanding which sessions are active tells you when you'll find tight spreads, meaningful moves, and tradeable setups, and when you should stay out.
The Four Major Sessions
| Session | Open (GMT) | Close (GMT) | Most active pairs |
|---|---|---|---|
| Sydney | 22:00 | 07:00 | AUD/USD, NZD/USD |
| Tokyo | 00:00 | 09:00 | USD/JPY, AUD/JPY, EUR/JPY |
| London | 08:00 | 17:00 | EUR/USD, GBP/USD, EUR/GBP |
| New York | 13:00 | 22:00 | EUR/USD, USD/CAD, USD/CHF |
These times shift by one hour during daylight saving changes (clocks in the UK and US don't always change on the same day). The Trading Session Clock shows which sessions are open right now in real time.
The London–New York Overlap: Best Trading Window
The overlap between the London and New York sessions (13:00–17:00 GMT) is when the forex market sees the highest volume of any period in the trading day. Both of the world's largest financial centers are simultaneously active, and major institutional flows — asset managers rebalancing, corporations converting revenues, banks filling client orders — all concentrate in this window.
The result: tightest spreads of the day, most consistent trends, highest pip movement potential, and the clearest follow-through on breakouts. EUR/USD, GBP/USD, and USD/JPY are all highly liquid during this period. If you can only trade one window, this is it.
The Tokyo Session
Tokyo is the most active Asian session but significantly quieter than London or New York in terms of EUR/USD and GBP/USD volume. Yen pairs (USD/JPY, EUR/JPY, GBP/JPY) are most liquid here. Expect tighter ranges and slower price action for major non-JPY pairs — the Asian session is often characterized by ranging markets as institutions in Europe and North America are not yet active.
When to Avoid Trading
Sunday open (22:00 GMT): The market reopens after the weekend with low liquidity and often unpredictable gap behavior. Spreads can be 2–3× their normal level for the first 30–60 minutes. Avoid opening new positions during this period.
Major news releases: NFP (first Friday of the month), FOMC statements, CPI releases, and major central bank decisions all cause brief but extreme volatility spikes. Spreads widen dramatically. Stops that sit near price can be triggered by a momentary spike that immediately reverses. Unless you're specifically trading the news, close positions before these events or widen stops to account for the temporary volatility.
Holiday periods: Late December, early January, and major US/UK holidays see dramatically reduced volume and erratic price action. Setups that work in normal conditions often don't follow through in thin holiday markets.