Session Overlap
A period during the trading day when two major financial centers are open simultaneously, resulting in peak market liquidity and volume.
Plain-English Meaning
An overlap happens when one global market wakes up before another goes to sleep. For a few hours, traders from two different continents are actively buying and selling at the exact same time.
Why It Matters
Overlaps are the most active trading windows. High liquidity means spreads are tight and price trends are more robust. The most critical period is the London and New York overlap, which handles a massive portion of daily volume.
Simple Example
Between 8:00 AM and 12:00 PM Eastern Time, traders in London and New York are active simultaneously. This 4-hour window routinely produces the day's largest price movements.
This educational example uses selected assumptions for reference calculation purposes. Real conditions may vary by broker, exchange, or instrument.
Beginner Mistake
Attempting to trade breakout strategies immediately after a major session overlap ends. As volume quickly drains from the market, prices tend to consolidate or drift aimlessly.