London Open Killzone Calculator
Calculate exact London open killzone times adjusted for your local time zone and DST. Enter values for instant results with step-by-step formulas.
Calculator
Adjust values & calculateAll ICT Killzones (UTC-5)
ICT Silver Bullet Windows
Formula
All ICT killzones are defined in UTC/New York time. The London killzone runs 7:00-10:00 UTC (2:00-5:00 AM NY). Convert to local time by adding your UTC offset. Account for both local DST and UK DST, which change on different dates, creating transition periods where the effective offset shifts.
Last reviewed: December 2025
Worked Examples
Example 1: New York EST Trader - Winter Schedule
Example 2: Dubai Trader - GST (UTC+4)
Background & Theory
The London Open Killzone Calculator applies the following established principles and formulas. Foreign exchange markets facilitate the conversion of one currency into another and serve as the largest and most liquid financial markets in the world, with daily turnover exceeding seven trillion US dollars. Exchange rates are quoted as currency pairs, expressing the price of one unit of a base currency in terms of a quote currency. For example, a EUR/USD rate of 1.0850 means one euro buys 1.0850 US dollars. The smallest standardized price movement in most pairs is the pip, typically the fourth decimal place, with a value of 0.0001 per unit for USD-denominated pairs. The bid price is the rate at which a dealer will buy the base currency, while the ask price is the rate at which it will sell. The spread between bid and ask represents the dealer's compensation and varies with liquidity and volatility. Leverage amplifies both gains and losses by allowing traders to control positions larger than their deposited margin. A 100:1 leverage ratio means a one-percent adverse move eliminates the entire margin, making position sizing and risk management critical. Two parity conditions from international economics anchor exchange rate theory. Purchasing Power Parity (PPP) holds that exchange rates should adjust over time so that identical goods trade at equivalent prices across countries: S = P_d / P_f, where S is the spot rate and P_d and P_f are domestic and foreign price levels. PPP performs well over long horizons but poorly in the short run due to trade barriers, non-tradable goods, and capital flows. Covered Interest Rate Parity (CIRP) is a near-arbitrage condition stating that forward exchange rate premiums or discounts exactly offset interest rate differentials between two currencies: F/S = (1 + r_d) / (1 + r_f). Deviations from CIRP create riskless arbitrage opportunities that traders rapidly eliminate. Uncovered Interest Rate Parity posits that high-yielding currencies should depreciate to offset their interest advantage, though empirical evidence is mixed and the carry trade — borrowing in low-rate currencies to invest in high-rate ones — has generated persistent returns.
History
The history behind the London Open Killzone Calculator traces back through the following developments. For much of the nineteenth century and early twentieth century, the international monetary system operated under the classical gold standard, under which each participating currency was fixed to a defined weight of gold, making bilateral exchange rates effectively constant. The system provided price stability and facilitated global trade but constrained governments' ability to respond to economic downturns. World War One shattered the gold standard as nations suspended convertibility to finance wartime expenditures. The interwar period saw attempts to restore gold convertibility, most notably the British return to the gold standard in 1925 at the pre-war parity, a decision criticized by John Maynard Keynes as deflationary. The Great Depression forced widespread currency devaluations and the effective collapse of the international gold standard by the early 1930s. The Bretton Woods Conference of July 1944 established a new order in which member currencies were pegged to the US dollar, while the dollar alone was convertible into gold at 35 dollars per troy ounce. The International Monetary Fund and World Bank were created at the same conference to oversee the system. Bretton Woods delivered exchange rate stability during the postwar growth era but came under strain as US deficits and European dollar accumulation outpaced American gold reserves. On August 15, 1971, President Nixon announced the suspension of dollar-gold convertibility — the so-called Nixon Shock — effectively ending the Bretton Woods system. By 1973, major currencies had transitioned to floating exchange rates determined by market supply and demand, a regime that has persisted. On September 16, 1992, hedge fund manager George Soros shorted the British pound against the European Exchange Rate Mechanism constraints, forcing the UK's withdrawal in what became known as Black Wednesday. Electronic trading platforms emerged in the 1990s and 2000s, replacing voice-brokered interbank markets and dramatically reducing transaction costs for institutional and retail participants alike.
Frequently Asked Questions
Formula
Local Time = UTC Time + UTC Offset (+1 if local DST)
All ICT killzones are defined in UTC/New York time. The London killzone runs 7:00-10:00 UTC (2:00-5:00 AM NY). Convert to local time by adding your UTC offset. Account for both local DST and UK DST, which change on different dates, creating transition periods where the effective offset shifts.
Worked Examples
Example 1: New York EST Trader - Winter Schedule
Problem: A trader in New York (UTC-5, no DST) needs all ICT killzone times in their local time. UK is also not in DST (GMT).
Solution: London Open KZ: 7:00-10:00 UTC = 2:00-5:00 AM EST\nNew York KZ: 12:00-15:00 UTC = 7:00-10:00 AM EST\nAsian Session: 0:00-5:00 UTC = 7:00 PM-12:00 AM EST (prev day)\nLondon Close: 14:00-16:00 UTC = 9:00-11:00 AM EST\nSilver Bullet 1 (London): 10:00-11:00 UTC = 5:00-6:00 AM EST\nSilver Bullet 2 (NY AM): 14:00-15:00 UTC = 9:00-10:00 AM EST\nSilver Bullet 3 (NY PM): 19:00-20:00 UTC = 2:00-3:00 PM EST
Result: London KZ: 2-5 AM | NY KZ: 7-10 AM | Asia: 7 PM-12 AM
Example 2: Dubai Trader - GST (UTC+4)
Problem: A trader in Dubai (UTC+4, no DST) needs London killzone and Silver Bullet times.
Solution: London Open KZ: 7:00-10:00 UTC + 4 = 11:00 AM-2:00 PM GST\nNew York KZ: 12:00-15:00 UTC + 4 = 4:00-7:00 PM GST\nAsian Session: 0:00-5:00 UTC + 4 = 4:00-9:00 AM GST\nSilver Bullet 1: 10:00-11:00 UTC + 4 = 2:00-3:00 PM GST\nSilver Bullet 2: 14:00-15:00 UTC + 4 = 6:00-7:00 PM GST\nSilver Bullet 3: 19:00-20:00 UTC + 4 = 11:00 PM-12:00 AM GST
Result: London KZ: 11 AM-2 PM | NY KZ: 4-7 PM | Convenient daytime trading
Frequently Asked Questions
What is the London Open Killzone in ICT trading?
The London Open Killzone (LOKZ) is a specific time window identified by ICT (Inner Circle Trader) during which the highest probability trading setups occur as the London session begins. The standard killzone runs from 2:00 AM to 5:00 AM New York time (7:00 to 10:00 UTC). During this window, institutional traders in London begin placing their orders, creating significant volatility and directional moves. ICT teaches that this is when the daily range expansion typically begins, making it one of the most important trading windows of the day. The killzone concept helps traders focus their analysis and execution on the times when smart money is most active and price moves are most reliable.
Why is the London session considered the most important forex session?
The London session handles approximately 35 to 40 percent of all daily forex volume, making it the largest single trading session in the world. This dominance occurs because London sits at the intersection of Asian and American trading hours, creating natural overlap periods with both sessions. Major European banks, hedge funds, and institutional traders execute their daily orders during London hours. The session produces the widest daily price ranges for most currency pairs, particularly European crosses. ICT emphasizes that roughly 70% of the daily high or low is formed during London hours. The concentration of institutional activity means that price moves during the London session are more likely to represent genuine institutional direction rather than noise.
How do Daylight Saving Time changes affect the killzone?
Daylight Saving Time (DST) changes significantly impact killzone timing because the US and UK switch at different dates. The US springs forward on the second Sunday in March and falls back on the first Sunday in November. The UK changes on the last Sunday in March and last Sunday in October. This creates a two-to-three week gap where the time difference between London and New York changes by one hour. During these transition periods, the London killzone effectively shifts by one hour relative to New York time. ICT traders must account for these shifts by recalculating their local killzone times whenever DST changes occur. Failing to adjust can cause traders to enter positions outside the optimal window, reducing the probability of their setups.
What typically happens during the London killzone?
During the London killzone, several predictable market behaviors typically occur in sequence. First, there is often a false move or Judas Swing that sweeps the Asian session high or low, trapping retail traders on the wrong side. Then, the true daily directional move begins with strong displacement candles showing institutional commitment. This displacement usually includes the formation of fair value gaps and order blocks that serve as potential entry points on pullbacks. Volume increases dramatically compared to the Asian session, and spreads on major pairs narrow as liquidity floods the market. The first 30 minutes of the killzone often set up the direction, while the remaining time sees the initial expansion. Most of the significant daily levels are established during this three-hour window.
How does the London-New York overlap killzone differ from the London open?
The London-New York overlap period (12:00-15:00 UTC or 7:00-10:00 AM NY) is distinct from the London Open killzone in both character and purpose. During the overlap, both major financial centers are actively trading, creating the highest liquidity of the day. While the London Open typically establishes the daily direction, the overlap period either continues the London session move or reverses it. ICT teaches that the overlap is where the daily high or low is often formed on reversal days. The New York session can confirm the London direction by breaking further in the same direction, or it can create a reversal by sweeping the London session extreme and reversing. Traders who missed the London Open often find the second-best entries during this overlap window.
Should all forex pairs be traded during the London killzone?
While the London killzone is the most versatile trading window, not all currency pairs perform equally well during this time. European pairs like EURUSD, GBPUSD, EURGBP, and EURCHF are ideal because European institutional flows directly impact these currencies. The US Dollar index and its major pairs also move well because London traders actively position ahead of US data releases. However, pairs like AUDUSD and NZDUSD may show better setups during the Asian-London overlap or during their respective domestic sessions. USDJPY can work during London but often produces its best moves during the New York session. ICT recommends focusing on no more than two to three pairs during any killzone to maintain analysis quality and avoid overtrading across too many instruments.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy