FlowStructure
New York is the most heavily traded window of the day, which makes it the one most people gravitate towards and the one most people misread. The times are easy. What makes the window behave the way it does is everything the Asian range and the London session left behind before it opened.
The exact times
The New York AM Killzone runs 7:00AM to 11:00AM ET. It opens an hour before the New York session does and runs on into it — the session itself runs from 8:00AM to 5:00PM ET.
| Session | Session hours | Killzone |
|---|---|---|
| Asian | 7:00PM – 4:00AM | 8:00 – 10:00PM |
| London | 3:00AM – 12:00PM | 2:00 – 5:00AM |
| New York | 8:00AM – 5:00PM | 7:00 – 11:00AM |
Note that London is still open when New York begins. The two sessions overlap between 8:00AM and 12:00PM ET, and that overlap is part of what makes the New York morning as active as it is — two major regions are participating at once rather than one handing over to the other.
Why the window runs 7:00 to 11:00
The start is set by the open: the window begins an hour before it. The end is set by two fixed events inside the window, both of which draw participation.
Major US economic data is released at 8:30AM ET. Employment figures, inflation readings and similar releases land on that exact minute. Whatever the market believed at 8:29 can be repriced within seconds.
The US equity market opens at 9:30AM ET. That brings a second surge of participation, and it tends to spill across into currencies and indices rather than staying contained.
By 11:00 the initial reaction to both has usually worked through, participation thins into the lunch hours, and conditions change character. That is where the window closes.
Foundations covers the AM Killzone only. There is a separate afternoon window later in the New York session, but it behaves differently and is left for more advanced material.
What New York inherits
This is the part that separates the New York window from the others. When the London Killzone opens, the Asian session has produced a fairly contained range and not much else. When New York opens, there is already a full session of movement on the chart.
That means New York arrives to a market that has structure. London has usually taken one side of the Asian range and established some direction. In doing so it has created its own high and its own low, and those levels now hold resting orders in exactly the way the Asian range did earlier.
So the question at the New York open is not "which way from nothing", but what the session does with what London built. Broadly, two things happen:
- Continuation. New York participation extends the London move in the same direction, often after a shallow pullback.
- Reversal. New York moves back through the London range, reaching the liquidity on the opposite side.
Both are common. Neither is a rule.
Where beginners usually go wrong
Assuming New York always reverses London. This gets repeated constantly and it is simply not true. It happens often enough to be worth knowing about and not often enough to trade blindly.
Trading straight into a data release. Being positioned at 8:29 for an 8:30 release is a coin flip with unpredictable spreads and slippage. Knowing the release calendar is part of preparation, not something to discover mid-trade.
Chasing the 9:30 open. The equity open produces movement, and movement without context is not opportunity. The volatility is real; the direction is not given to you.
Treating the window as permission. The same point as with London. A time window narrows your attention. It does not tell you what to do, and it does not guarantee that anything worth taking will appear.
How this fits into reading price
Session timing is context, not a setup. It tells you when institutions are most likely to be active, which is useful because it stops you watching a chart for fourteen hours waiting for something to happen.
What it does not do is give you direction, location or confirmation. In the FlowStructure framework, structure gives direction, liquidity gives purpose, and points of interest give location. Timing sits underneath those as the layer that sharpens when you look — never what you take.
Read against the London window, the New York morning becomes considerably easier to interpret. Read on its own, it is just the busiest four hours of the day.
Common questions
What time is the New York AM Killzone?
The New York AM Killzone runs from 7:00AM to 11:00AM Eastern Time. It starts an hour before the New York session opens, and that session runs 8:00AM to 5:00PM ET.
Why does the New York AM Killzone run from 7:00 to 11:00?
It starts at 7:00 because the New York session opens at 8:00 and the Killzone starts an hour before the open, in the same way London's does. It runs to 11:00 because those four hours cover both fixed events — the 8:30AM ET data release and the 9:30AM ET equity open — and the period where measured volatility is highest.
Does New York always reverse the London session?
No. New York sometimes continues the London move and sometimes reverses it. Treating reversal as a rule rather than one of several possibilities is a common mistake.