The forex session overlap edge

By Tradify Editorial · 10 March 2026

Forex runs twenty-four hours a day, which sounds like freedom and functions like a trap. The market is always open, but it is not always worth trading. Volatility, spreads and the quality of directional movement are concentrated into a small part of the clock, and the traders who consistently extract money from currencies almost all organise their day around that fact.

Why the overlap matters

London is the largest FX centre in the world; New York is the second. For a few hours each afternoon UK time, both are fully staffed and both are transacting. Two deep pools of institutional flow — corporate hedging, fund rebalancing, options-related activity and speculative positioning — hit the same order books at once. Depth increases, spreads compress, and the moves that start in that window have the participation behind them to actually travel.

Outside that window, particularly in the late New York and early Asian hours, spreads widen and price often drifts in low-conviction ranges. The same breakout setup that works during the overlap has a materially worse expectancy at 3 a.m. UK time, because there is nobody on the other side to carry it.

A session map worth memorising

• Asian session: ranges tend to form and hold. The high and low of this range become reference levels for the rest of the day.
• London open: the most common time for the Asian range to be broken — often after a brief sweep of one side to trigger stops.
• London/New York overlap: peak liquidity and the highest share of the day's total range. This is where trends extend and reversals have force.
• Late New York: participation falls away, moves lose follow-through, and holding for extension becomes a low-percentage bet.

The sweep-and-reclaim pattern

The highest-quality recurring structure in FX intraday trading is a liquidity sweep followed by a reclaim. Price runs one side of the Asian range or the prior day's extreme, takes out the resting stops sitting there, fails to find continuation, and closes back inside the range. Entry is on the reclaim, invalidation is beyond the sweep's extreme, and the target is the opposite side of the range.

The logic is the same as any trap: the stops that were hit represented real orders, and the participants who placed them are now flat or reversed. If price cannot hold the new territory it just paid for, the path of least resistance is back through the range it came from.

In FX, time of day is a filter, not a detail. Same setup, different hour, different edge.

News is a liquidity event, not a direction

Major releases — inflation prints, central bank decisions, employment data — do not just move price, they change the character of the order book. Spreads blow out, slippage becomes real and stops fill in places that never appear on the chart afterwards. Trading the instant of a release is a slippage lottery.

A far better use of the same event is the twenty to forty minutes after it, once the initial spike has been absorbed and the market shows where it wants to settle. The level that price defends after the dust clears is more informative than the spike itself, and it comes with a stop you can actually rely on.

Building the routine

Pick one session window and trade only it for a full quarter. Mark the Asian range, the prior day's high and low, and the week's opening price before the session starts. Note the scheduled releases and decide in advance whether you are flat through them. Then wait for price to interact with one of your marked levels during the window — and if it never does, take no trade and log the discipline as a win.

The advantage of a fixed window is not just cleaner price action. It makes your trading data comparable. When every trade happens under similar liquidity conditions, your journal starts producing usable statistics instead of a mess of incomparable situations. Consistency of context is what turns a sample of trades into an edge you can actually measure and improve.