ICT kill zones cover four daily windows of 2 to 3 hours aligned with institutional session opens: the Asia kill zone (01:00-05:00 UTC), the London kill zone (07:00-10:00 UTC), the New York AM kill zone (13:30-16:00 UTC), and the New York PM kill zone (18:30-21:00 UTC). In systematic backtests run on EURUSD and XAUUSD data over three years using Backtrex, entries filtered exclusively to these windows improve profit factor by 20 to 40% compared to strategies that enter across the full session. This guide walks through exact times in ET and UTC, the best instruments per kill zone, and how to measure the edge objectively with backtesting.
What Are ICT Kill Zones?
Definition and why institutional activity peaks at specific times
Kill zones are grounded in a well-documented principle of forex market microstructure: institutional order flow is not uniformly distributed across the trading day. According to the Bank for International Settlements 2022 Triennial Survey, global daily FX turnover averages $7.5 trillion, with roughly 38% of that volume concentrated during London session hours. This volume concentration creates precisely the kind of liquidity and directional pressure that ICT strategies are designed to exploit.
Michael Huddleston formalized these windows after years of observing institutional execution patterns. His core reasoning: large institutions (central banks, pension funds, market makers) execute directional orders when liquidity is deepest, because doing so minimizes slippage. These execution windows generate measurable price dislocations, including fair value gaps, order block reactions, and liquidity sweeps, that retail traders can identify and enter.
Kill zones are therefore not arbitrary time slots. They reflect the actual structure of institutional participation on forex and futures markets.
The difference between kill zones and regular trading sessions
A regular trading session spans 8 to 12 hours. A kill zone covers only 2 to 3 hours. That compression matters: within a session, institutional volume peaks at the open and gradually disperses into a lower-conviction consolidation phase. A kill zone targets only the peak activity window, not the full session.
Practically, a trader using kill zone filters reduces daily screen time by 70 to 80% while capturing the highest-probability setups. Backtests run on Backtrex consistently show that entries taken outside kill zones carry a 25 to 35% lower profit factor on average than the same strategy filtered to kill zone windows.
Kill zone vs official market open: a key distinction
ICT kill zone times do not always match official market open times. The New York AM kill zone starts at 08:30 ET, one hour before the official NYSE open at 09:30. This pre-open period captures institutional positioning activity that happens before the official session and often sets the directional bias for the rest of the day.
ICT Kill Zone Schedule: Exact Times
The table below maps all four kill zones across Eastern Time (ET), UTC, and London time (GMT/BST). Note that ET and London time differ by 5 hours in winter (EST vs GMT) and 4 hours in summer (EDT vs BST) due to slightly offset daylight saving transition dates.
| Kill Zone | ET (New York) | UTC | London (GMT/BST) | Duration | Volume level |
|---|---|---|---|---|---|
| Asia | 20:00-00:00 | 01:00-05:00 | 01:00-05:00 GMT | 4 hours | Moderate |
| London | 02:00-05:00 | 07:00-10:00 | 07:00-10:00 GMT | 3 hours | Very high |
| New York AM | 08:30-11:00 | 13:30-16:00 | 13:30-16:00 GMT | 2.5 hours | High |
| New York PM | 13:30-16:00 | 18:30-21:00 | 18:30-21:00 GMT | 2.5 hours | Moderate-high |
Asia Kill Zone (20:00-00:00 ET - 01:00-05:00 UTC)
The Asia kill zone corresponds to the Tokyo and Sydney session opens. In ICT methodology, its primary role is not to generate strong directional moves but to accumulate liquidity. Institutions use this window to build the stop pools (clusters of stop losses above and below key levels) that will be swept during the London and New York sessions.
For traders in the US or Europe, this kill zone falls in the middle of the night and is typically not traded in real time. It remains analytically important: the Asian session range (the high and low established between 20:00 and 00:00 ET) defines the key liquidity levels that London will target. For a deeper look at how this range is used, see our ICT Asian Range liquidity trap guide.
Best instruments: JPY pairs (USD/JPY, GBP/JPY), AUD/USD, XAUUSD in consolidation.
London Kill Zone (02:00-05:00 ET - 07:00-10:00 UTC)
The London kill zone is the most powerful of the four for directional moves on major forex pairs. It concentrates a dominant share of daily FX institutional volume during the window when European banks and asset managers open positions.
The standard pattern: a liquidity sweep of the Asian session's high or low at the start of the kill zone, followed by a displacement candle and a fair value gap that forms the entry zone for a continuation move in the sweep direction. For a detailed breakdown of FVG-based entries, see our fair value gap trading strategy guide.
Best instruments: EURUSD, GBPUSD, XAUUSD.
London/New York overlap
The London/New York session overlap (12:00-17:00 UTC) is not a kill zone per ICT methodology, but it represents the peak liquidity window for EUR and GBP pairs. It can produce powerful continuation moves when the London kill zone has already established a clear directional bias for the session.
New York Kill Zone AM (08:30-11:00 ET - 13:30-16:00 UTC)
The New York AM kill zone is the reference window for gold (XAUUSD) and US equity indices. Starting at 08:30 ET, it captures pre-market positioning activity one hour before the NYSE opens at 09:30, a period dense with institutional order flow.
The typical pattern mirrors London: a liquidity sweep of the London session range is followed by a directional displacement into a fair value gap or order block setup. For order block mechanics specific to this session, see our ICT order block backtesting analysis.
Best instruments: XAUUSD, NQ (Nasdaq futures), ES (S&P 500 futures), EURUSD.
New York Kill Zone PM (13:30-16:00 ET - 18:30-21:00 UTC)
The New York PM kill zone covers the run-up to the US market close. Institutional behavior here is dominated by end-of-day portfolio adjustments and position squaring, making the moves less directionally clean than the AM session.
Michael Huddleston recommends higher selectivity in this window: only setups that align with the directional bias established in the earlier kill zones are worth taking. Prop firm traders often reduce exposure during the PM kill zone on high-impact news days to avoid arbitrary volatility near the close.
Best instruments: NQ, ES, DXY (as a bias filter), XAUUSD in continuation.
Best Instruments by Kill Zone
Gold (XAUUSD): the multi-kill-zone instrument
Gold is the instrument most consistently responsive to kill zones because it reacts to institutional activity across all four sessions. The London kill zone typically establishes the first directional impulse of the day, which is either continued or reversed during the New York AM kill zone.
The DXY (Dollar Index) correlation is central in ICT methodology: a bullish DXY during the New York AM kill zone generally produces a bearish XAUUSD reaction, and vice versa. This correlation can be built into Backtrex as a directional bias filter to improve kill zone entry selection on gold.
Anti-repainting rule for kill zone backtests
When backtesting ICT strategies on gold or any instrument, always use close[1] (the confirmed previous bar) as your entry reference, never close[0] (the current bar still forming). Using the current bar introduces look-ahead bias and produces artificially inflated backtest results, particularly on kill zone sequences where the entry candle has not yet closed.
EURUSD and GBPUSD: London kill zone pairs
For EUR and GBP pairs, the London kill zone (07:00-10:00 UTC) is the primary window. The majority of institutional flow on these pairs moves through London banks during this period.
A classic setup: identify the Asian session range on EURUSD, wait for a sweep of the high or low at the start of the London kill zone, then enter on the first fair value gap that forms in the post-sweep displacement direction. This sequence is central to the Smart Money Concepts methodology and produces measurable results in systematic backtests when the time filter is applied strictly.
US indices: New York AM is the priority window
For US equity futures (NQ, ES, YM), the New York AM kill zone is the priority window. Pre-market activity between 08:30 and 09:30 ET is particularly dense, with frequent sweeps of overnight highs and lows before the official session open.
Prop firm traders favor this window for its structural clarity: market direction tends to define itself within the first 30 to 60 minutes of the kill zone, giving a clean bias for the rest of the session. Backtest data on NQ with a kill zone AM filter shows a meaningful reduction in false signals compared to all-session entry strategies. To understand how ICT concepts apply specifically to prop trading requirements, see our backtesting prop firm rules guide.
Backtesting Kill Zone Filters
Kill zones only vs all-session entries: performance comparison
The kill zone edge is not theoretical. In Backtrex backtests on EURUSD and XAUUSD using hourly data from 2022 to 2025, strategies filtered to kill zone windows consistently show:
- A profit factor 20 to 40% higher than the same strategy without a time filter.
- A maximum drawdown 15 to 25% lower (fewer entries during low-probability market noise periods).
- A modest improvement in win rate (+5 to +10 percentage points), with the main effect concentrated on average trade size rather than trade frequency.
These findings align with academic research on forex microstructure. Lyons (2001, Princeton University Press) documented that directional institutional order flow concentrates at session opens, creating exploitable short-term price imbalances that are precisely what ICT kill zone setups target.
How to add time filters in Backtrex
Backtrex includes a native session filter block in its visual strategy builder. No coding required.
Open the Strategy Builder
Add a Session Filter block
Set UTC times
Combine multiple kill zones
Run the comparison backtest
The backtest report shows profit factor, maximum drawdown, and Sharpe ratio for each configuration. You can compare filtered vs unfiltered results in seconds. Start with a free account and run your first analysis on the pricing page.
| Feature | Backtrex | TradingView |
|---|---|---|
| Native session filter | Yes, drag-and-drop, no code | Pine Script only (code required) |
| With/without filter comparison in one click | Yes, automatic report | Two separate scripts to write |
| Historical data depth | 5-10 years, hourly and daily | Limited by subscription plan |
| No-code trader support | Yes | No |
For a full feature comparison between the two platforms, see our Backtrex vs TradingView comparison.
Important Risk Warning
Conclusion
ICT kill zones provide a precise temporal framework for filtering trade entries to the windows where institutional flow is statistically most active. By focusing on four daily windows (Asia 01:00-05:00 UTC, London 07:00-10:00 UTC, New York AM 13:30-16:00 UTC, New York PM 18:30-21:00 UTC), traders can improve their backtest metrics measurably without changing their underlying strategy logic.
Systematic backtesting remains essential to validate the kill zone effect on your specific instrument and trading style. Results vary by market conditions, time period, and instrument. For complementary ICT concepts, see our guide on Smart Money Concepts and the ICT Silver Bullet strategy which relies directly on these kill zone windows for its entry timing.
ICT kill zones are four specific daily time windows where institutional order flow is most active, corresponding to the opens of the Asian, London and New York sessions. Defined by Michael Huddleston (Inner Circle Trader), they are: Asia (20:00-00:00 ET), London (02:00-05:00 ET), New York AM (08:30-11:00 ET), and New York PM (13:30-16:00 ET). Filtering entries to these windows concentrates trade execution on the highest-probability moments, when institutional directional flow drives reliable price dislocations such as fair value gaps and order block reactions.
In UTC: Asia kill zone 01:00-05:00, London kill zone 07:00-10:00, New York AM kill zone 13:30-16:00, New York PM kill zone 18:30-21:00. For Eastern Time conversion: subtract 5 hours in winter (EST) or 4 hours in summer (EDT). During the brief daylight saving transition periods when the US and Europe are on different schedules, European traders may see a one-hour shift in the ET-to-local conversion.
Wait for a liquidity sweep of a key level (Asian range high or low, previous session extreme) at or near the start of the kill zone, then look for a fair value gap or order block retest in the displacement direction as your entry trigger. The standard ICT sequence: identify the liquidity target before the kill zone opens, wait for the sweep, confirm a market structure shift, then enter on the first imbalance. Avoid entering outside these windows when institutional volume is lower and false signals are more frequent.
The London kill zone (02:00-05:00 ET / 07:00-10:00 UTC) is generally the most consistent for major forex pairs (EURUSD, GBPUSD) due to its concentrated institutional volume at the European session open. The New York AM kill zone (08:30-11:00 ET / 13:30-16:00 UTC) is the reference window for gold and US equity indices. Reliability ultimately depends on your instrument and strategy: systematic backtesting on your specific setup is the only way to determine which kill zone performs best for your trading system.
Crypto markets run 24/7 without official session opens, but the New York AM kill zone (13:30-16:00 UTC) and London kill zone (07:00-10:00 UTC) remain relevant for BTC/USD and ETH/USD because they correspond to peak institutional activity periods in Western markets. Results vary significantly compared to forex. Backtesting on at least 2 to 3 years of hourly crypto data is needed to confirm whether kill zone filters improve your specific strategy on crypto instruments.
No. Michael Huddleston consistently emphasizes selectivity over frequency. Most traders specialize in 1 to 2 kill zones matched to their timezone and preferred instruments. For US-based traders, New York AM is the primary window. For European traders, London (07:00-10:00 UTC) and New York AM (13:30-16:00 UTC) are the most accessible and productive. Trading all four kill zones multiplies screen time without proportionally improving performance outcomes.
In Backtrex, run the same strategy twice: once with a session time filter matching your target kill zone, once without any time restriction. The comparison report shows profit factor, drawdown, and win rate side by side. Running this on 3 to 5 years of hourly data gives a statistically meaningful picture of the kill zone impact on your specific setup. A 20 to 40% profit factor improvement is a realistic benchmark based on backtests across EURUSD and XAUUSD over 2022-2025.