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Forex

London-NY overlap

The 13:00-17:00 UTC window when both London and New York FX desks are active. Tightest spreads, deepest book, ~70% of daily FX volume.

What it means

The London FX session opens 08:00 UTC; New York opens 13:00 UTC; London closes 17:00 UTC; NY closes 22:00 UTC. The 4-hour overlap from 13:00-17:00 UTC concentrates the largest desks on both sides of the Atlantic simultaneously. Daily FX volume peaks during this window — EUR/USD trades roughly 4x its 24-hour average volume per minute during overlap.

Why it matters

Spread, slippage and execution quality are all at their best during overlap. A strategy executed at 14:00 UTC on EUR/USD pays ~0.2 pip spread; the same strategy at 03:00 UTC pays ~1.0 pip — a 5x cost difference for the same trade. For active strategies, overlap timing is one of the highest-leverage adjustments you can make.

How to use it

Time scalping and high-frequency strategies to execute during overlap. For position trades on majors, prefer entries/exits during overlap to minimise slippage. Avoid Asian-session entries on G7 pairs unless your strategy specifically targets the Asian-session range.

Take it further

Want a worked example or a deeper dive? Ask Rocky how this concept applies to your specific watchlist or trade idea.

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