The foreign exchange market operates around the clock on weekdays, but activity is not constant. It rises and falls as financial centres open and close. Understanding the main sessions can help you decide when to study charts and when to avoid trading altogether.

The three main sessions

Approximate times in Indian Standard Time (IST) are shown below. They shift by an hour when the United States or Europe changes clocks for daylight saving, so check the current offsets.

  • Asian session: roughly 05:30 to 14:30 IST, with Tokyo and Sydney as major centres.
  • London session: roughly 12:30 to 21:30 IST in winter hours and one hour earlier in summer.
  • New York session: roughly 18:30 to 03:30 IST, again shifting with daylight saving.

Overlaps

The overlap between London and New York is typically the most active period, because two of the largest centres are open together. The overlap between Tokyo and London is shorter and generally quieter.

How behaviour tends to differ

  • Asian session: often calmer for pairs like EUR/USD and GBP/USD, which can trade in narrow ranges. Yen and Australian dollar pairs tend to be more active.
  • London session: frequently sees a burst of movement at the open as European participants arrive. Prior ranges may be broken or tested.
  • New York session: news from the United States can cause sharp moves, particularly at the scheduled release time.

These are tendencies, not rules. On some days the Asian session is the most volatile.

Why traders mark session highs and lows

The high and low of a session are widely watched levels. Price often tests the previous session's extreme as the next session begins, which links to the liquidity concepts discussed elsewhere on this site. Many traders mark the Asian range and observe what London does around it.

Practical points

  1. Know your pair's active hours. Trading GBP/USD in a quiet period can mean wider relative spreads and slower movement.
  2. Check the economic calendar. Major releases can move price sharply and widen spreads.
  3. Mind weekends and rollovers. Spreads can widen around the daily rollover time, and prices can gap after the weekend.
  4. Choose hours you can sustain. For a trader in India, the best-known overlap falls in the evening and night. Trading when tired is a common cause of poor decisions.

A note on regulation

Residents of India are only permitted to trade forex in certain ways. Read our article on forex regulation in India before taking any step involving real money.

This article is educational and is not investment advice. Session times are approximate.