What Are Forex Trading Sessions?

A forex trading session refers to the period when a major global financial center is open for normal business. While retail traders can place trades almost any time during the trading week, institutional volume (like banks, funds, and corporate trading) usually peaks during these local business hours.

Instead of tracking dozens of individual cities, the forex market is commonly divided into four major sessions that follow the sun.

Because businesses, governments, and travelers need to exchange currency globally, the market cannot sleep. When banks in Tokyo are closing for the day, banks in London are just starting their morning. When London is wrapping up, New York is active.

The four major sessions are practical references. They are not strict exchange hours, but general timeframes used to track regional liquidity.

Session times are often displayed in UTC (Coordinated Universal Time) as a neutral baseline. However, these are reference times and may differ depending on the source, daylight saving time (summer/winter shifts), and broker schedules.

A market overlap happens when two major sessions are open at the same time.

The most famous overlap is the London / New York overlap. This period (when afternoon in London overlaps with morning in New York) often sees the highest trading volume, tightest spreads, and significant price action.

Liquidity means how easily an asset can be bought or sold without causing a big price change.

During peak sessions or overlaps, many traders, banks, and funds are participating. This usually means higher liquidity and tighter spreads. During the quiet hours between sessions (like late New York afternoon before Sydney opens), fewer participants are trading. This can lead to lower liquidity, slower movement, or occasionally wider spreads and sudden, thin-market volatility.

Some traders prefer to trade specific pairs when the related region is awake and active.

A common beginner mistake is thinking:

“Forex is open 24 hours, so every hour is equally good for trading.”

This is not correct. The market may be open, but activity levels change. Some hours may have wider spreads, lower liquidity, or slower movement. Other hours may have faster movement and higher volatility.

Another mistake is using a session table without converting it correctly into local time. Daylight saving time can shift displayed session times. A better habit is to use a timezone-aware converter and check broker platform hours before planning trades.