Forex Market Hours & ICT Kill Zone Times

The sessions and kill zones, explained

A trading “session” is simply the part of the day when a particular financial centre is active. A kill zone is narrower: a window inside that session where ICT-style traders expect the cleanest setups, because liquidity and volatility concentrate there rather than spreading evenly through the day.

• London Open (02:00–05:00 NY) — the first major volatility of the day. Europe comes online and frequently sweeps the range built overnight.
• New York AM (07:00–10:00 NY) — the highest-participation window, with London and New York both active. Most US data lands here.
• London Close (10:00–12:00 NY) — European desks square up, which often produces a reversal or retracement against the morning move.
• New York PM (13:30–16:00 NY) — the afternoon session, quieter but with its own repeatable behaviour into the close.
• Asian Range (20:00–00:00 NY) — usually consolidation. The high and low it builds become reference levels for the sessions that follow.

Why timezone conversion causes so many errors

Almost all ICT and smart-money material quotes times in New York, which is sensible — it keeps everyone referring to the same window. The mistake happens at conversion, and it happens twice a year for a specific reason: the US and Europe change their clocks on different dates. For a couple of weeks each spring and autumn the usual gap between London and New York shifts by an hour, and a trader working from a memorised offset turns up to the London open sixty minutes late.

The clock above avoids that by converting from real timezone data rather than a fixed offset, so the numbers stay right through every transition without you adjusting anything.

Which of these hours actually move

A session being open is not the same as it being busy. We measured the average range of every hour on thirteen markets over two years, and eleven of them are busiest between 9:00 and 11:00 New York, when US data, the cash open and the London afternoon overlap. The Asian session is the quiet part of the day for almost everything except the yen. The best time to trade tool shows the hour-by-hour numbers for each market, converted to your time zone.

Using session times in a strategy

Knowing the windows is the easy part. The useful question is whether your setup actually performs better inside one of them — and that is measurable rather than a matter of belief. Tag every trade you test with the session it formed in, and after a large enough sample you will know whether your edge is genuinely session-dependent or whether you have simply inherited someone else's assumption.

That is what replay is for: step through historical price one candle at a time with the session context visible, and log the outcome. The CRTLAB simulator does exactly that on forex, indices, metals, oil, crypto and US stocks, and how to backtest ICT concepts walks the process end to end.

Frequently asked questions