The London breakout is one of the oldest intraday forex strategies, and it still works for a simple reason: the Asian session is usually quiet, and the London open brings the largest wave of new liquidity of the day. When that volume arrives, price often leaves the overnight range decisively.
This guide turns the idea into rules you can test.
Why the London open moves price
London handles more forex volume than any other financial centre. In the hours before it opens, Asian trading in the major European pairs is thin, so price tends to drift inside a narrow band. When European banks, funds and corporates start trading, orders that built up overnight hit the market at once. Stop orders sitting just above and below the Asian range add fuel when they are triggered.
Step 1: Mark the Asian range
On a 15-minute chart, mark the high and low between roughly 7:00 p.m. and 2:00 a.m. New York time — the Tokyo session up to the hour before London. That box is your range.
Measure its height in pips. A range that is unusually wide (for example, larger than the pair’s average daily range divided by two) means much of the day’s move may already have happened; skip those days.
Getting the times right
London’s clocks change on the last Sunday of March and of October; New York’s change on the second Sunday of March and the first Sunday of November. For a few weeks each spring and autumn the gap between the cities is four hours instead of five, so the London open falls at 4:00 a.m. New York time rather than 3:00 a.m. The simplest fix is to set your chart to London time and mark the range from 00:00 to 07:00 London.
A range-width filter in practice
If GBP/USD averages 100 pips a day, skip any day where the Asian range is wider than about 50 pips. On a 28-pip range there is plenty of room left; on a 60-pip range, much of the day’s movement has already happened.
Step 2: Wait for a confirmed break
Between 3:00 a.m. and 5:00 a.m. New York time, wait for a 15-minute candle to close outside the range. A wick through the level is not enough — those are the moves that most often reverse.
Step 3: Choose your entry
There are two versions, and you should test them separately:
- Momentum entry: enter at the close of the breakout candle. You catch every move but take more false breaks.
- Retest entry: place a limit order at the broken range edge. You miss the strongest moves that never pull back, but your stop is tighter and your reward-to-risk improves.
Step 4: Stop loss and targets
- Stop: at the midpoint of the Asian range, or on the other side of the breakout candle — whichever gives the idea room to work.
- Target 1: one range height projected from the breakout level.
- Target 2: the previous day’s high or low, or a fixed 2R.
- Time stop: if neither stop nor target is hit by 11:00 a.m. New York time, close the trade. The edge comes from the open; holding into the afternoon turns it into a different trade.
Size every trade from the stop distance with the position size calculator so a wide range doesn’t quietly double your risk.
Filters that improve results
- Trade with the daily trend. Only take upside breaks when price is above the 20-day moving average, and downside breaks when below.
- Respect the calendar. UK and Eurozone data often lands between 2:00 and 5:00 a.m. New York time. Stand aside if a high-impact release is due inside your window.
- One trade per day. If the first break fails and stops you out, don’t immediately take the opposite break. Revenge entries are where this strategy loses most of its money.
Example. GBP/USD builds a 28-pip Asian range. At 3:30 a.m. a 15-minute candle closes 6 pips above the high. A limit order at the range high fills on the retest; the stop sits at the range midpoint, 14 pips away; target 1 is 28 pips above the breakout — a 2:1 reward-to-risk.
Sizing the example trade
On a $10,000 account risking 1% ($100), a 14-pip stop on GBP/USD — where one standard lot is worth about $10 per pip — gives $100 ÷ (14 × $10) ≈ 0.71 lots. On a 28-pip stop at the opposite side of the range, the same risk is only 0.36 lots. The wider stop is not “safer”; it just means a smaller position. The pip value calculator handles pairs where the US dollar is not the quote currency.
Managing the trade
- Partial at target 1: take half off at one range height and move the stop to breakeven.
- Trail the rest behind 15-minute swing lows (for longs) until target 2 or the 11:00 a.m. time stop.
- No re-entry after breakeven stop-outs unless a fresh, clean retest forms before 5:00 a.m.
Common mistakes
| Mistake | Fix |
|---|---|
| Entering on a wick through the range | Wait for a 15-minute close outside it. |
| Trading wide-range days | Skip ranges larger than about half the average daily range. |
| Taking the opposite break after a loss | One trade per day; record the reversal for your data instead. |
| Ignoring the clock change | Mark the range in London time so the window never drifts. |
| Holding into New York lunch | Use the 11:00 a.m. time stop. |
Applying it to gold
The same structure works on XAU/USD, which also expands at the London open. Gold’s ranges are wider in pips, so lot sizes must be smaller for the same dollar risk. Our gold trading strategy covers the gold-specific version in detail.
How to test it
Log at least 50 sessions on one pair with screenshots: range width, break direction, entry type, result in R. Track the two entry types separately. Then check whether your average R and win rate produce positive expectancy using the risk/reward calculator.
Frequently asked questions
What time is the London open in New York time?
The London session opens at 8:00 a.m. London time, which is 3:00 a.m. New York time for most of the year. The two cities change their clocks on different dates in spring and autumn, so the gap is briefly four hours instead of five.
Which pairs work best for a London breakout?
Pairs with a European currency — GBP/USD, EUR/USD, EUR/GBP and GBP/JPY — tend to show the clearest London-open expansion because European banks are the main source of new volume at that hour.
What timeframe is best for the London breakout?
Most traders mark the Asian range and confirm breaks on the 15-minute chart. A 5-minute chart gives earlier entries but more false breaks; a 1-hour chart filters noise but often leaves the stop too wide.
Is the London breakout suitable for prop firm challenges?
It can be, because it trades one window per day with a defined stop. The main risk is the daily loss limit on wide-range days, so size from the stop distance and skip ranges wider than about half the pair's average daily range.
Does the London breakout work every day?
No. On many days price breaks one side of the Asian range, reverses and breaks the other. Filters such as range width, news timing and the higher-timeframe trend reduce, but never eliminate, false breaks.