At a glance
The short version
- A kill zone is a time filter, not a setup or a signal.
- The four standard windows, in New York time, are London Open 02:00–05:00, New York AM 07:00–10:00, London Close 10:00–12:00, and New York PM 13:30–16:00.
- The Asian range, 20:00–00:00 New York, is usually treated as range formation rather than a kill zone.
- Kill zones are quoted in New York time by convention, which is why converting them correctly matters more than it appears to.
- The premise is that participation and therefore liquidity concentrate at session opens and overlaps, not that the clock itself causes moves.
- A kill zone narrows when you look for a setup; it does not tell you what the setup is or which direction to take it.
- Measured over two years on 13 markets, the four kill zones cover 11 of the 23 trading hours but held 53–65% of all hourly movement on forex, gold, silver, oil and the indices.
- On Bitcoin, which trades around the clock, the four kill zones held 50% of hourly movement — about their share of the clock, so the time filter adds little there.
- The busiest kill zone per hour was London Close (10:00–12:00 New York) on 12 of 13 markets, because it holds the 10:00–11:00 hour, the busiest or second-busiest hour of the day almost everywhere.
- The London Open kill zone barely moved gold: its hours averaged 1.0× an ordinary hour outside the kill zones, against 1.5× for EUR/USD and 1.7× for GBP/USD.
Why specific windows, and not others
The reasoning is participation. Volume and volatility are not spread evenly through the 24-hour session — they cluster around the times major financial centres open, and around the overlap when London and New York are both active. More participants means more resting orders, which means more of the liquidity that sweeps depend on.
So a kill zone is a claim about when the conditions a setup relies on are most likely present. It is not a claim that the hour itself produces the move, and treating a kill zone as a signal — taking a trade because the clock struck — misreads it entirely.
The standard windows
London Open (02:00–05:00 NY) — the first significant volatility of the day, frequently sweeping the range built overnight. New York AM (07:00–10:00 NY) — the highest-participation window, with both London and New York active and most US data releases landing inside it.
London Close (10:00–12:00 NY) — European desks squaring up, which often produces a retracement or reversal against the morning's move. New York PM (13:30–16:00 NY) — quieter, with its own repeatable behaviour into the close.
You can see all four live, converted to your own timezone, on the session and kill zone clock.
What two years of data says about each kill zone
We measured the average range of every New York hour on 13 markets over two years (the same data as the best time to trade tool), then compared each kill zone's hours with an ordinary hour outside all four. The windows are real: on forex, metals, oil and the indices, the kill zones cover under half the trading day and hold 53–65% of its movement. They are not equally real.
London Close (10:00–12:00) is the busiest per hour on 12 of 13 markets — 2.3× an ordinary hour on the Nasdaq, 1.9× on EUR/USD. That is less about London closing than about the 10:00 US data and the first hour after the stock market's open. Treat it as the back half of the New York morning, not a quiet exit.
New York AM (07:00–10:00) runs 1.8× on EUR/USD and 1.8× on the Nasdaq, but its first hour is the weakest: index traders get most of it from 9:30 on. London Open (02:00–05:00) is a forex and DAX window — 1.7× on GBP/USD, 1.8× on the DAX — and close to an ordinary hour on gold (1.0×). New York PM is an index window (1.7× on the Nasdaq) and an ordinary stretch for forex (1.1× on EUR/USD).
On Bitcoin and Ethereum the four windows held about their share of the clock (50% of Bitcoin's hourly movement). Crypto keeps New York hours, but kill zones built around the forex sessions are not what drive it. How far a whole day usually travels, and how much of it is done by noon, is on the average daily range tool.
The timezone problem
Kill zones are quoted in New York time because that is the convention almost all ICT material uses. The failure happens at conversion, and it happens predictably twice a year: the US and Europe change their clocks on different dates, so for a couple of weeks each spring and autumn the usual offset shifts by an hour.
A trader working from a memorised offset arrives at the London open sixty minutes late during those windows. Converting from real timezone data rather than a remembered number removes the problem entirely.
What a kill zone does not do
It does not supply direction, and it does not validate a setup. A kill zone narrows when you look; the setup still has to satisfy everything it would need to at any other time — higher-timeframe context, a liquidity event, a defined invalidation.
Whether your own edge genuinely performs better inside a given window is also measurable rather than assumed. Tag every tested trade with the session it formed in, and after a large enough sample you will know whether your results are session-dependent or whether you inherited the belief without checking it.
Frequently asked questions
What is a kill zone in ICT trading?
A specific window within the trading day when liquidity and volatility concentrate, and in which ICT traders expect the highest-quality setups. It is a time filter rather than a signal.
What are the ICT kill zone times?
In New York time: London Open 02:00–05:00, New York AM 07:00–10:00, London Close 10:00–12:00, and New York PM 13:30–16:00. The Asian range, 20:00–00:00, is usually treated as range formation rather than a kill zone.
Why are kill zones quoted in New York time?
By convention — almost all ICT material uses New York as the reference, which keeps everyone describing the same window regardless of where they live. Converting to local time is where errors occur, particularly around daylight saving changes.
Is a kill zone a trading signal?
No. It narrows when you look for a setup; it does not tell you what the setup is or which direction to take. A trade taken purely because a kill zone opened has no edge behind it.
Do kill zones actually work?
As a volatility filter, yes, mostly. Over two years on 13 markets, the four kill zones covered 11 of 23 trading hours but held 53–65% of hourly movement on forex, metals, oil and indices. They are uneven: London Close was the busiest per hour on 12 of 13 markets, while the London Open barely beat an ordinary hour on gold. Whether your own setup performs better inside one is a separate question, measured by tagging tested trades with the window they formed in.
Which ICT kill zone is the most volatile?
London Close, 10:00–12:00 New York, on 12 of the 13 markets we measured, because it contains the 10:00–11:00 hour. The exception was the DAX, whose London Open window holds the 09:00 Frankfurt cash open.