London Breakout Strategy: Trading the Asian Range
The London breakout strategy explained: mark the Asian range, plan entries, stops and targets, handle false breaks and spreads, and test it before use.
Overnight, GBP/USD often drifts inside a band of 20 or 30 pips. Then Europe wakes up, volume arrives, and within an hour or two one side of that band gives way. Plenty of traders have tried to build a routine around that moment.
Quick answer: A London breakout strategy marks the high and low of the quiet Asian session, the Asian range, and trades the first decisive break of it after London opens at 08:00 UK time (10:30 or 11:30 in Iran). It works when the open brings a real move and fails on news-driven and quiet days.
What is the London breakout strategy?
The idea rests on how activity moves around the clock. Forex trades 24 hours a day on weekdays, but not evenly. During the Asian session, the main European and American centres are closed, and pairs such as EUR/USD and GBP/USD often move less than they will later in the day. Their overnight high and low form a box on the chart, usually called the Asian range.
London is the largest centre for currency trading in the world, according to the BIS Triennial Survey, so when European dealers arrive, orders that have built up overnight reach the market together. Price frequently leaves the overnight box in the first hours of the European morning. A London breakout strategy tries to capture that first move: mark the Asian range before the open, and trade a breakout above its high or below its low.
The appeal is obvious. The rules can be written down precisely, the levels are objective, and the routine fits a fixed time of day. The weakness is just as clear once you look at real charts: the first break is often false, and on some days there is no follow-through at all. Most of this article is about those days.
If breakouts are new to you, start with our guide to breakout trading, which explains why fakeouts happen, and the Academy lesson on breakout trading, which this article builds on.
London session times in UK and Iran time
Everything in this strategy is tied to the clock, and the clock moves twice a year. The UK uses Greenwich Mean Time (GMT, equal to UTC) in winter and British Summer Time (BST, UTC+1) from the last Sunday in March to the last Sunday in October; the UK government’s clock-change page lists the dates. Iran stopped using daylight saving after 2022, so Iran stays on UTC+3:30 all year. The gap between London and Iran therefore changes:
- UK summer (BST): Iran is 2 hours 30 minutes ahead of the UK.
- UK winter (GMT): Iran is 3 hours 30 minutes ahead of the UK.
In 2026 the UK clocks go back on Sunday 25 October, so from that date until Sunday 28 March 2027 the winter column applies.
| Moment | UK time | UTC (summer / winter) | Iran (UK summer / winter) |
|---|---|---|---|
| Asian range starts (one common choice) | 00:00 | 23:00 / 00:00 | 02:30 / 03:30 |
| Frankfurt opens; UK data often released | 07:00 | 06:00 / 07:00 | 09:30 / 10:30 |
| London open | 08:00 | 07:00 / 08:00 | 10:30 / 11:30 |
| End of a typical breakout window | 11:00 | 10:00 / 11:00 | 13:30 / 14:30 |
| Major US data (08:30 New York) | 13:30 | 12:30 / 13:30 | 16:00 / 17:00 |
There is one more wrinkle. The US changes its clocks on different dates (the second Sunday in March and the first Sunday in November), so for a few weeks each year New York is only four hours behind London instead of five. In those weeks, US data arrives at 12:30 UK time, an hour earlier than usual, and right inside a London morning trade.
The clock below shows the four main sessions in your own time zone, so you can see where the London open falls wherever you are reading this.
Open now: …
The four main forex sessions in your local time. The London ring begins at the open that a London breakout strategy is built around; the band on the outer ring is the London and New York overlap.
Marking the Asian range
Before any order goes in, you need two numbers: the highest and lowest prices between a fixed start and end time. There is no single official definition. Common choices include midnight to 07:00 UK time, the whole Tokyo session, or 00:00 to 06:00 UTC. What matters is that you pick one definition, write it down and use it every day, because a range that shifts with your mood is no longer a rule.
Some details are worth deciding in advance:
- Use wicks, not closes. The range is usually the highest high and lowest low, including wicks, on an hourly or 15-minute chart.
- Know your platform’s clock. Your chart may run on server time rather than UK time. If midnight on the chart is 22:00 UTC, your “00:00 to 07:00” box is not the box you think it is.
- Check the width. Measure the range in pips and compare it with recent days. A range that is unusually narrow suggests a very quiet night, and the break may be equally sleepy. A range that is unusually wide often means the move has already happened, perhaps after Asian-session news, and London has less left to do.
Some traders filter out days on which the range is narrower or wider than set limits, for example below 15 pips or above 50 on GBP/USD. Treat any such numbers as starting points to test, not as known thresholds: the right figures depend on the pair, the season and the general level of volatility. A volatility measure such as the ATR indicator makes the comparison fairer than a fixed pip count, because what counts as a wide range in a quiet month is ordinary in a busy one.
Entries, stops and targets
A London breakout strategy needs four rules, decided before the open: how you enter, where the stop goes, where you take profit, and when you give up on the day.
Entry. There are two broad approaches. The first is a bracket: a buy stop order a few pips above the Asian high and a sell stop a few pips below the low, with whichever fills first cancelling the other. It never misses a move, and it fills on every false break too. The second is to wait for confirmation: a candle that closes outside the range during London hours, then an entry either at that close or on a pullback to the broken edge (a retest). Waiting filters out some false breaks but misses moves that never look back.
Stop. The two common places are the middle of the Asian range and just beyond its far side. A midpoint stop is tighter and allows a bigger position for the same risk, but it sits within the range where ordinary noise lives. A far-side stop gives the trade room but often makes the reward-to-risk unattractive when the range is wide.
Target. Some traders aim for a multiple of the range height (one times the range beyond the break is a common starting point), others a fixed reward-to-risk such as 1.5R or 2R, and others a level from the chart such as a pivot or yesterday’s high. Our guide to pivot points shows where those reference levels come from.
Time exit. Most versions close any open trade by a fixed time, often before the main US data at 13:30 UK time or at the end of the London session. The idea is to trade the London move, not to hold a position into a different session with different drivers.
Whichever stop you use, the position size comes from it, so the money at risk stays the same. With a $5,000 account and 1% risk, a 17-pip stop on GBP/USD allows about 0.29 lots ($50 ÷ (17 × $10)), and a 34-pip stop about 0.14 lots. Try both in the calculator below. The Academy lesson on position sizing explains the formula.
False breakouts and the retest
On a chart, the Asian high and low are the most obvious levels of the morning. That makes them the place where stop orders gather: stops on short positions just above the high, stops on longs just below the low, and breakout entry orders on both sides. When the first European orders push price through one edge, those stops are triggered, adding a burst of buying or selling. Once that burst is used up, price can reverse back into the range and sometimes break the other side. This pattern is described as a false breakout or fakeout. It is a description of what price did, not proof of anyone’s intention.
A day can go three broad ways, and a London breakout rule has to survive all of them.
Step through one illustrative morning on GBP/USD, hour by hour, to see how two different entry rules handle a false break.
Illustrative GBP/USD hourly chart, 00:00 to 13:00 UK time. The Asian range is 1.2712 to 1.2742. A bracket order is caught by the 07:00 false break; a rule that waits for a London-hours close and a retest enters later and exits on time.
A retest does not always come. On strong days price leaves the range and never looks back, which is the price a confirmation rule pays for avoiding some false breaks. Our article on breakout trading compares the two entries over several trades.
Spreads and slippage at the open
The spread on major pairs is usually at its widest in the thin hours around the daily rollover, late in the New York afternoon, which is also close to when many Asian ranges begin. A range that includes those hours can have its high or low set by a spike in the spread rather than by real trading, so some traders start the range after rollover for that reason.
At the London open itself, liquidity is improving, and spreads on EUR/USD and GBP/USD typically narrow rather than widen. The cost problem at the open is different. A breakout entry uses a stop order, and a stop order becomes a market order when it is triggered, so it fills at the next available price. When the first European orders arrive together, or when UK data is released at 07:00, the next available price can be a few pips beyond your level. That is slippage, and it falls hardest on strategies that place orders exactly where everyone else does. Two other costs are easy to miss:
- Buy stops trigger on the ask, sell stops on the bid. On a chart drawn from bid prices, a buy stop can fill even though the candle never appears to touch your level.
- Small ranges magnify costs. A 1.5-pip round-trip cost is 9% of a 17-pip stop. On a 10-pip range with a 5-pip stop it is 30%, which makes the maths very hard to win.
Try the simulator to see how the same stop order fills in calm and fast conditions. Our guides to slippage and the bid-ask spread explain both costs in detail, and the Academy lesson on the bid-ask spread covers the basics.
Illustrative. A breakout entry is a stop order, and a stop order fills at the next available price. In calm conditions that is your level; when orders rush in at the open or on a data release, it can be several pips further away.
Why the London breakout fails on news days and quiet days
The strategy assumes that the London open is the main event of the morning. Two kinds of day break that assumption.
News days. UK data, including monthly GDP and inflation, is published by the Office for National Statistics at 07:00 UK time, exactly when many Asian ranges end. German and euro-area figures often follow during the European morning, and a Bank of England decision is announced at 12:00 UK time on scheduled days. On those mornings, the break of the range is driven by the release, not by the open. Price can spike through one side, fill your stop order with slippage, and reverse within minutes as the market digests the details. The same goes for a central bank surprise during the Asian session, which can blow the range out before London arrives. Check the economic calendar the evening before, and decide in your rules whether you skip release days or trade only after the release. The Academy lesson on news trading sets out the choices.
Quiet days. Some mornings nothing happens: a holiday in one centre, a market waiting for a big release later in the week, or just a slow week in August. Price pokes a few pips beyond the range, fills the order, and drifts back. With a midpoint stop, that is a small loss; with a time exit, a trade closed near the entry after costs. Run enough quiet days in a row and the small losses add up.
A short checklist, run before the open, filters out the worst of both.
Testing a London breakout strategy before you use it
Every rule in this article has a setting you could change: the range start and end, the buffer, the entry type, the stop, the target, the time exit, the filters. That freedom is the danger. With enough settings, you can find a combination that looks excellent on last year’s charts purely by chance, a problem called curve fitting. It will usually look much worse on next year’s.
A fair test looks like this:
- Write every rule before you look at results. Range times in UK time, buffer in pips, entry type, stop, target, time exit, and which days you skip. If a rule needs judgement, write down how you will judge it.
- Use enough days. A morning strategy produces at most one trade a day, so a few months gives only a few dozen trades. Aim for at least 100 trades, across both summer and winter time and both calm and volatile periods.
- Include realistic costs. Add the spread, commission and some slippage on stop entries. A rule that only works with zero slippage does not work.
- Record results in R. Win rate, average win and loss, expectancy, the longest losing run and the deepest drawdown.
- Forward test on demo. Run the unchanged rules live on a demo account for several weeks, which also tests whether you can follow them at 10:30 or 11:30 Iran time on a working day.
The Academy lesson on testing a strategy walks through each step. The simulator below runs a simple breakout rule (a close beyond the 20-bar channel, with a stop at its middle) on simulated prices. It is not a London breakout test, but it shows the same behaviour: switch between trending, ranging and mixed conditions and watch the same rules win in one and bleed in another.
The rules
- Prices: 240 simulated closes starting at 1.0850, moving 8–12 pips a bar at random. Trending: a steady drift that changes direction once or twice. Ranging: always pulled back towards one level, staying within roughly 60 pips either side. Mixed: range, then trend, then range.
- ATR (a measure of normal movement): average size of the last 14 bar-to-bar moves × 1.6.
- Trend (MA cross): when the 10-bar average crosses the 40-bar average, enter in that direction. Stop 2 × ATR away. Exit (and reverse) on the next cross, or at the stop.
- Breakout: buy a close above the highest close of the last 20 bars, sell a close below the lowest. Stop at the middle of that 20-bar channel. Exit when price closes beyond the opposite 10-bar extreme, or at the stop.
- Range fade: buy a close below the lower Bollinger band (20-bar average − 2 standard deviations), sell above the upper. Target the 20-bar average. Stop 1.5 standard deviations beyond entry. Exit after 20 bars if neither is hit.
- RSI reversal: buy when RSI(14) drops below 30, sell when it rises above 70. Exit when RSI crosses 50, or at a stop 2 × ATR away.
- Every strategy: one trade at a time, entered at the close. Stops are checked on each close, so a loss can be slightly more than 1R. Each result is measured in R (the distance to the first stop) after a 1-pip cost.
Simulated prices, not real data. Breakout rules: buy a close above the 20-bar high, sell a close below the 20-bar low, stop at the middle of that channel, exit on the opposite 10-bar extreme. Switch the market type and press New prices to see how much results vary.
Breakout rules usually win less than half their trades and rely on occasional larger winners. That means long losing streaks are normal, even for a rule with a genuine edge. Set the simulator below to a 40% win rate, 1% risk and an average win of 1.5R, and run it several times to see what a normal year of drawdowns can look like.
Each run uses the same settings with different luck. Run it several times: the shape changes, the drawdowns don't go away.
Leverage lets you open a position much larger than your deposit, so a run of losses on an oversized position can do lasting damage. Keep risk per trade small, and remember that a London breakout strategy, like any rule, can stop working when market conditions change.
Common London breakout mistakes
Using a different range every day
Changing the start time, or ignoring a wick “because it was a spike”, means you are no longer testing or trading one rule. Fix the definition in UK time and adjust for your platform’s server clock.
Forgetting the clock change
On the Monday after the UK clocks change, the London open moves by an hour against UTC and Iran. In the weeks when the US and UK clocks are out of step, US data lands an hour earlier in the London morning. Put the dates in your calendar.
Trading straight into a 07:00 release
A bracket order sitting at the range edges at 07:00 UK time on a UK GDP or inflation morning is a bet on the release, not on the open. Decide in advance whether you skip those days.
Chasing after the move has gone
If price has already travelled a full range beyond the break by the time you look, the reward-to-risk has gone. Missing a trade costs nothing; chasing one turns a defined rule into an impulse.
Judging the strategy on a handful of mornings
Five winning days in a row says little, and five losing days says equally little. Judge it on at least 100 trades, recorded in R, with costs included.
Frequently asked questions
What time is the London open in Iran?
The London session opens at 08:00 UK time. Iran stays on UTC+3:30 all year, while the UK moves between GMT and BST. So the London open is 10:30 Iran time from the last Sunday in March to the last Sunday in October, and 11:30 Iran time for the rest of the year.
What is the Asian range in forex?
The Asian range is the high and low a currency pair makes during the Asian session, when European and American centres are closed. A common definition is midnight to 07:00 UK time. There is no official definition, so choose one, write it down and use it every day.
Does the London breakout strategy still work?
It depends on the pair, the period and the exact rules, including costs. The first break after the open is often false, and news days and quiet days cause most losses. The only way to know whether your version has an edge is to test written rules on at least 100 trades, then forward test on demo.
Where should I put my stop on a London breakout?
The usual choices are the middle of the Asian range or just beyond its far side. A midpoint stop is tighter and allows a bigger position for the same risk but is hit more often. A far-side stop gives more room but can make the reward-to-risk poor. Size the position from whichever you choose.
Which pairs suit a London breakout?
The strategy is mostly applied to pairs whose own centres open with London, such as GBP/USD, EUR/USD and EUR/GBP, because the open changes their activity the most. Pairs that are already active overnight, such as USD/JPY or AUD/USD, have less of a quiet range for London to break.
Should I trade the London breakout on news days?
Many versions skip any morning with a major UK or euro-area release between 07:00 and 11:00 UK time, because the release rather than the open drives the move and slippage on stop orders is worse. Others wait until the release has passed. Decide in your written rules and test that choice.
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