London–New York overlap — the peak of the FX trading day

It is 14:30 Central European Time on the first Friday of the month. The US jobs report has just landed, and EUR/USD, which drifted quietly all morning, spikes sixty points in a dozen seconds and then snaps back. At that very moment the spread is as tight as it has been all day. This is neither luck nor formless chaos. This is the afternoon overlap of London and New York — the window in which the world's two biggest markets trade at once, and the genuine peak of the trading day on Forex.

What the London–New York overlap is and when it runs

The overlap, meaning the shared window of two sessions, is the stretch of hours when the European desks are still working and the American desks have already opened. In practice it starts around 14:00 Central European Time, when New York opens while London is still in full swing, and it lasts until roughly 17:00, the close of the European session. That is about three hours during which both sides of the Atlantic set prices at the same time.

These edges are not fixed. They shift by about sixty minutes around daylight-saving changes, because the United States and Europe move their clocks on slightly different dates. For a few weeks each year, when one side has already switched and the other has not, the whole window can open and close an hour earlier or later. So it is worth checking the current hours with your own broker now and then, rather than clinging to a single number all year round.

Why liquidity reaches its peak here

To understand why this window is so special, you have to look at the scale of the two markets. The Bank for International Settlements survey from 2022 shows that desks in the United Kingdom handle about 38 percent of global currency turnover and American desks another 19 percent. That is the first and second currency centre on the planet. The rest — Singapore at about 9 percent, Hong Kong at 7, Japan at 4 — is clearly smaller.

When these two largest hubs trade at the same time, something happens that occurs at no other hour of the day. The largest share of daily turnover flows through the market, and on a global scale that turnover reaches about 7.5 trillion dollars a day. The order book is the deepest it gets, and competition between liquidity providers is fiercest. The more participants willing to buy and sell at similar prices, the smaller the gap between bid and ask. The wider mechanics of how liquidity concentrates in particular hours of the day are laid out in more depth in the trading hours guide on ForexMechanics.

The effect shows up most clearly on the euro-dollar. The EUR/USD spread drops in this window to a fraction of a pip and is the lowest of the day. It is not the magic of a particular hour, just the simple consequence of the world's two deepest markets working in parallel. By contrast, the far more modest morning overlap of Tokyo and London is a different beast, which I cover separately in the piece on the London session — there the shared window is barely an hour, and it is more a handover of the baton than a true overlap.

„The best time to trade is when the London and US sessions overlap, because that is when the market is most liquid." — Kathy Lien, Day Trading and Swing Trading the Currency Market, Wiley, 2016

Which pairs to trade in this window

Since it is the American session that adds the second half of the energy, you will see the cleanest moves where the dollar stands on one side of the pair. EUR/USD comes first — it has the tightest spread, the deepest liquidity, and the most decisive moves right now. Close behind are GBP/USD and USD/JPY, the other most liquid dollar pairs.

Other dollar majors work well too, such as USD/CHF and USD/CAD, especially around US data releases. The Canadian dollar can be particularly lively when US and Canadian data fall on the same day. Exotics and less liquid crosses do not benefit from this window to the same degree — their home markets are already closed or have yet to wake up — so for a beginner the natural choice is EUR/USD and GBP/USD. I break down the American part of the day in detail in the article on the New York session.

The double edge — best conditions and biggest traps

The same window that delivers the tightest spreads is also the most dangerous for the careless. The reason is simple: most of the important US macro data falls right here. The jobs report, the famous Non-Farm Payrolls, is published on the first Friday of the month at 14:30 Central European Time. At the same hour, on its own day, CPI inflation reaches the market. These are releases that can move the euro-dollar by dozens of points in a dozen seconds.

In practice this means that liquidity and volatility go hand in hand here. The tight spread from before the release can widen many times over in a second, and the price jumps both ways before the market settles on a direction. Those violent moves one way and back are a classic minefield for stop losses placed too close. That is why experienced traders either deliberately enter these releases with a smaller position, or wait for the first wave of chaos to subside and the market to show its true direction. The Federal Reserve statement is a different story — it usually lands around 20:00 Central European Time, after London has closed, when only New York is left on the market.

The realistic slice of the overlap for someone working a day job

Here an honest problem appears for most working traders. The full window of 14:00 to 17:00 falls during working hours, so the entire liquidity peak is out of reach live for anyone with a day job. There is no point pretending you can get around it — but you can make smart use of what genuinely remains.

What is realistic to catch is the tail of the window. If you finish work around four in the afternoon, you still have roughly an hour of London and New York trading together, and after Europe closes the New York afternoon stays liquid. That is enough to work EUR/USD or GBP/USD in decent conditions, without having to take time off. The second layer is pending orders and price alerts set before you leave for work — in the morning you mark your levels together with a stop loss and let the broker execute the entry for you if the market gets there. If you are still putting together a full daily plan for working with the market, the rundown in the piece on the best hours to trade will help.

What to do tomorrow

1. Check the current hours with your broker. Note when the overlap actually starts in the present clock — summer or winter time — because a one-hour difference also shifts the moment US data is released.
2. Compare spreads at three times of day. Record the EUR/USD spread in the morning, in the afternoon during the overlap, and late in the evening. You will see in black and white that the afternoon gives the cheapest entry into the market.
3. Mark 14:30 in your calendar. Write down the dates of the jobs report and CPI inflation for the coming month. If you are on a break then, deliberately step down your risk rather than entering the middle of the turmoil.
4. Use the tail of the window. After work, between four in the afternoon and the evening, focus on EUR/USD and GBP/USD. It is still a liquid part of the day, and one you can realistically catch while holding down a job.