The London session breakout is the European cousin of the classic opening range breakout: mark the high and low of the first 30 minutes after the 08:00 London open, then trade the first decisive close beyond that range while European liquidity is at its deepest. On forex pairs it is folklore — one of the most-recommended session plays on the internet. It is also refreshingly testable, because every part of it (the range, the trigger, the stop, the time exit) can be pinned down mechanically with no judgment calls left over.
So we pinned it down: the 08:00–08:30 London range (DST-correct), the first 5-minute close beyond it between 08:30 and 11:00, a structure stop, a 2R target, flat by 11:00. Then we ran that rule across 12 months of real Binance 1-minute BTC and ETH data with realistic costs and 1% risk per trade — the same deterministic engine that powers Secuora’s AI backtester. The unfiltered results are below, losing months included, because the losing months are the research.
Verified Result
No edge: net negative after costs across 2 markets.
| Market | TF | Trades | Win | PF | Max DD | Net |
|---|---|---|---|---|---|---|
| ETH | 5m | 452 | 39.6% | 0.75 | 43.2% | -40.2% |
| BTC | 5m | 465 | 34.2% | 0.49 | 74.3% | -74.2% |
How the SVS 22 breaks down ▾
12 months of real 1-minute data, fees on (0.05%/side), $10k start, 1% risk. How the score works →
The exact rules we tested
- Opening range = the high and low of 08:00–08:30 London time (DST-correct).
- From 08:30 to 11:00 London: enter on the FIRST 5-minute close beyond the completed range (cross semantics — staying beyond the range does not re-signal).
- Long on a break of the range high; short on a break of the range low.
- Stop beyond the last opposing swing (fractal lookback 3); target 2R.
- Any open position closes flat at 11:00 London.
- Risk 1% of equity per trade; 0.05% commission per side; 10× max notional leverage.
Results
Binance spot 1-minute klines (data-api.binance.vision), aggregated per strategy timeframe · starting balance $10,000 · risk 1%/trade · Commission 0.05% per side; no spread/slippage modeled (BTC/ETH spot spreads are sub-basis-point); position size capped at 10× notional leverage. Generated 2026-06-12 by the Secuora ai-strategy deterministic runner (same engine as the in-app AI backtester).
| Month | Trades | Win rate | Net P&L |
|---|---|---|---|
| 2025-06 | 39 | 46% | −$893 |
| 2025-07 | 39 | 33% | −$1,470 |
| 2025-08 | 43 | 30% | −$1,221 |
| 2025-09 | 45 | 36% | −$976 |
| 2025-10 | 43 | 33% | −$561 |
| 2025-11 | 35 | 29% | −$472 |
| 2025-12 | 37 | 32% | −$397 |
| 2026-01 | 35 | 29% | −$428 |
| 2026-02 | 33 | 36% | −$152 |
| 2026-03 | 34 | 38% | −$4 |
| 2026-04 | 40 | 40% | −$303 |
| 2026-05 | 42 | 29% | −$538 |
| Month | Trades | Win rate | Net P&L |
|---|---|---|---|
| 2025-06 | 37 | 41% | −$330 |
| 2025-07 | 37 | 41% | −$472 |
| 2025-08 | 42 | 33% | −$934 |
| 2025-09 | 36 | 44% | −$125 |
| 2025-10 | 40 | 38% | −$389 |
| 2025-11 | 37 | 38% | −$254 |
| 2025-12 | 40 | 33% | −$891 |
| 2026-01 | 35 | 49% | $214 |
| 2026-02 | 34 | 50% | $61 |
| 2026-03 | 34 | 50% | $470 |
| 2026-04 | 36 | 36% | −$571 |
| 2026-05 | 44 | 30% | −$799 |
Assumptions (how loose terms were pinned down)
- Opening range = the high/low of 08:00–08:30 London time (DST-correct)
- Entry on the FIRST 5m close beyond the completed range, 08:30–11:00 London; flat at 11:00
- Stop beyond the last opposing swing (lookback 3); 2R target; 1% risk per trade
- Crypto trades 24/7 — the window captures the European-morning volatility regime
What the European-morning window actually paid
The honest headline: on this 12-month crypto sample the rule lost after costs on both symbols — the profit factor finished below 1 on BTC and on ETH, with BTC the clearly worse of the two. A 5-minute breakout system fires nearly every session, and every entry pays commission twice, so fees compounded the bleed; the totals are in the table. The win rates (mid-30s to high-30s) are not unusual for a 2R breakout system — the problem was that the winners never got far enough ahead of the losers to carry the costs.
The comparison that matters is on this site: the identical mechanics anchored to the 09:30 New York open (our opening range breakout page) lost less over the same year on both symbols. Same range logic, same stop, same target — different clock. On crypto, where there is no exchange open, the London morning is a softer volatility event than the US-equities open, and the window choice moved the result more than any tweak to the rules would have. That is worth knowing before you spend months optimizing entries.
How to backtest the London session breakout on Secuora
You can replay a year of London opens yourself, candle by candle, before risking anything:
- Open the free replay demo at /backtest/demo — no sign-up, no card; it replays real BTC data with the full drawing toolbar and two indicators.
- Set the chart to 5 minutes and step the replay to the 08:00 London open. (For one-click, DST-correct session-open skips — London, New York, Tokyo — create a free account and use the replay terminal.)
- Mark the 08:00–08:30 high and low with the drawing tools, then step forward bar by bar and note where the rule would have entered.
- To take the trades, sign up free and run the same session in the replay terminal: enter the first close beyond the range with a simulated order — stop at structure, take-profit at 2R — then push the trades to your journal in one click from the session summary.
- When you want the mechanical baseline in seconds instead of weeks, type the same rules in plain English into the AI backtester at /backtest/ai and compare its result against your discretionary sample.
Methodology, in one paragraph
Data: Binance spot 1-minute klines (data-api.binance.vision), aggregated per strategy timeframe, June 1, 2025 – June 1, 2026 (12 months). Execution: Secuora’s deterministic strategy runner (the same engine behind the in-app AI backtester) — single position at a time, entries at the close of the signal candle, commission 0.05% per side; no spread/slippage modeled (btc/eth spot spreads are sub-basis-point); position size capped at 10× notional leverage, starting balance $10,000, 1% risk per trade. Swings are confirmed fractals with no look-ahead. These are mechanical results: no discretion, every signal taken. Past performance does not predict future results; this is research, not financial advice.
Frequently asked questions
What is the London session breakout strategy?
Mark the high and low of the first 30 minutes after the 08:00 London open, then trade the first decisive close beyond that range — long above the high, short below the low — with a stop at structure and a fixed reward multiple, closing anything still open before the session matures. This page tests the 30-minute variant with a 2R target.
What win rate does the London breakout have?
In our mechanical 12-month BTC/ETH test the win rates landed in the mid-to-high 30s — the exact figures are in the results table above — but the profit factor finished below 1 on both symbols, meaning the rule lost money after costs. A win rate without the profit factor next to it tells you almost nothing.
Does the London breakout work on crypto?
Not as a bare mechanical rule in this sample: both BTC and ETH finished net negative after fees over 12 months. The European morning is a real volatility regime on crypto, but it is weaker than the US-equities open — the same mechanics anchored to 09:30 New York tested better on both symbols. On forex, where 08:00 London is a structural liquidity event, you would need to run the test on forex data — the FX majors are on Secuora’s free plan (a 14-day replay window); Pro unlocks the full forex depth.
What time does the London session open?
08:00 local London time, which shifts against other time zones twice a year with daylight saving. the session-open skips in Secuora’s replay terminal (London, New York, Tokyo) are DST-correct, so jumping to the London open always lands on the actual 08:00 candle regardless of the date you are replaying.