Session Timing and Killzones

Time is a filter, and it is testable

Most technical analysis asks where a setup formed. Session-based SMC asks when, and treats that as a first-class filter rather than a footnote. The reasoning is straightforward: participation is not constant through the day. The same structural shape printed at 03:00 London time, when the book is thin and a handful of algorithms are quoting, carries far less behind it than the identical shape printed twenty minutes after the London open with banks, funds and every European desk active.

SMC calls the high-participation windows killzones. The name is theatrical; the underlying claim is not. Volume, spread and average range all vary predictably by hour, and a filter built on something that measurable is one of the few parts of this framework you can test properly in your own records.

An Asian range of 28 pips, and what it sets up

Work a normal day. EUR/USD spends the Asian hours between 1.0846 and 1.0874, a 28-pip range, which is narrow but typical for a pair whose business happens in Europe and America. Those two numbers are now published reference points. Every trader watching the pair can see them, and orders collect just outside both.

London opens. In the first ninety minutes price pushes to 1.0881, seven pips above the Asian high, triggering the buy stops resting there, then turns and spends the rest of the morning working down to 1.0822. The initial push was seven pips. The move that followed was 59. Anyone who bought the break of the Asian high was long at the extreme of the day, and anyone who waited for the failure had a reference point (the 1.0881 high) to place a stop behind.

The numbers do the arguing here. A trader entering the breakout at 1.0876 with a stop at 1.0860, beneath the Asian high, has 16 pips of risk (the pip calculator converts that to cash for any lot size) and is stopped out inside the hour. A trader who waits for the reclaim, enters short at 1.0868 with a stop at 1.0885, has 17 pips of risk and a first target at the Asian low of 1.0846 for 22 pips. Same range, same day, same information. The difference is entirely in which side of the sweep they took.

The three windows people actually use

• The Asian range. Quiet hours where price often consolidates. Its high and low become the day’s first reference liquidity levels, which is most of its value.
• The London window. Roughly the first two to three hours of the European session. It frequently produces the day’s first decisive move, and often a sweep of one side of the Asian range before the direction that sticks.
• The New York window. Overlaps London for a few hours and hosts almost every significant US data release. It either extends the London move or reverses it sharply, and the presence of scheduled news is the main reason for the second outcome.

The overlap, when both London and New York are open, is where the majority of daily range on the majors is produced. That is a description of when the pair moves, not a promise about direction, which is a distinction worth keeping clear. Our guide to trading sessions has the hour-by-hour detail for each pair.