A market that never fully sleeps
The forex market trades continuously through the working week because it follows the sun across the world's financial centres. As one region winds down, another opens, so there is almost always somewhere active. Traders divide this into three broad sessions: Asia, London (Europe), and New York.
This around-the-clock nature is convenient, but it does not mean every hour is equally good to trade. Activity, liquidity, and volatility vary a great deal depending on which centres are open.
How the sessions differ
The Asian session tends to be quieter for many major pairs, with smaller ranges, though pairs involving the yen can be more active. The London session is typically the busiest and most liquid, and the New York session brings its own surge, especially around US economic data.
The overlap between London and New York is generally the most active window of the day, with the tightest spreads and the largest moves. This is when many active traders concentrate their attention, though busier does not automatically mean easier.
Why timing affects your costs
During quiet hours, spreads can widen and moves can be choppy and directionless — expensive conditions for the size of opportunity. During busy overlaps, spreads tighten but volatility rises, so stops can be hit faster. Neither is automatically better; they suit different approaches.
For a beginner, it helps to pick a consistent window that fits your schedule and get to know how your chosen pair behaves then, rather than trading randomly across all hours. Familiarity with a specific session's rhythm is worth more than trying to be awake for all of them.