Asian Session Range Trading, Explained
Trading folklore files the Asian session under “dead hours” — the stretch you sleep through so you’re fresh for London. Like most folklore, it contains a grain of truth wrapped in a wrong conclusion. Asian hours on major FX pairs are typically quieter than the London–New York stretch. That does not make them empty, and it’s precisely their character that makes the Asian range a useful reference for everything that happens after.
Asia is not a footnote — the sourced numbers
The BIS Triennial Survey from April 2025 — the most authoritative measurement of FX activity that exists — puts Singapore at 11.8% of global turnover, Hong Kong at 7.0% and Japan at 3.5%. Together, over 22% of the global market, with Singapore now clearly the largest FX centre in Asia. For comparison, the UK carries roughly 38% and the US about 19%.
So a fifth of the world’s FX business happens in centres whose working day is your “dead hours.” Quieter than London, yes — the deepest liquidity for EUR and USD pairs arrives when their home sessions open. But “quieter” and “irrelevant” are different words.
What the Asian range actually is
The Asian range is simply the high and low an instrument builds during Asian hours — commonly measured from the Tokyo open until the London open, though exact conventions vary the same way killzone boundaries do. It’s a definition, not a signal. On major pairs it tends to be narrower than the ranges that follow, for the mechanical reason above: less of the market’s participation is at the desk.
That narrowness is what makes it interesting. A tight, well-defined range built during lower participation becomes a visible reference the moment higher participation arrives. Both of its edges are obvious places where stop orders and breakout interest accumulate — which is why so much session-based teaching treats the Asian high and low as the day’s first meaningful liquidity levels.
The taught pattern — and the honest caveat
The classic session play runs: Asia builds a range, London opens, price runs one side of that range, and the “real” move follows. In ICT-derived teaching this maps onto the manipulation phase of Power of Three: the run through the Asian edge is read as a liquidity grab before the intended move.
Here is where we repeat something this blog has covered in depth: the assumption that a run through a level automatically reverses is not supported by the research. Peer-reviewed order-book work on stop-loss behavior found that stop-driven moves more often extend than reverse — the full argument, with sources, is in What Research Actually Says About Stop Hunts. An Asian-range break is a real event worth reading. Which kind of event it was — a sweep that fails, a break that holds, a retest that confirms — is only knowable from what price does next, not from the touch itself.
You will also find precise-sounding statistics in this niche — “X% of Asian range breakouts reverse by New York.” We looked for a methodologically transparent source for numbers like these and did not find one. Until someone publishes the dataset, treat them as decoration.
Reading the range in practice
Three practical uses survive the caveats. First, context: where price sits relative to the Asian range at London open tells you immediately whether the session is opening inside balance or already extended. Second, reference levels: the range’s high and low are objective, non-negotiable lines — unlike most support/resistance, two traders will draw them identically. Third, sequencing: if you follow a session framework, the Asian range is the “accumulation” candidate that gives the later phases something to be measured against.
What doesn’t survive: trading every break of every Asian range mechanically, in both directions, on every pair. Quiet ranges on a news-light day and compressed coils before a major release are different animals wearing the same box.
Tracking it without the busywork
Marking the range by hand every day — correct session boundaries, correct timezone, DST shifts, one box per instrument — is exactly the kind of bookkeeping that erodes discipline over time. SSM IQ Price Action with Sessions and PO3 draws sessions and their developing ranges as one consistent, automatic layer, so the reference exists before you’ve had coffee.
Where this leaves you
Respect the Asian session for what it is: a fifth of the global market building a quieter, well-defined range that the louder sessions then have to deal with. Use the range as reference and context. Be suspicious of anyone selling the break of it as a mechanical edge — in either direction.
Sources: BIS Triennial Central Bank Survey, April 2025 (Singapore 11.8%, Hong Kong 7.0%, Japan 3.5%, UK ~38%, US ~19% of global FX turnover, net-gross basis); Osler (2002, 2003) via our stop-hunts article (stop-order cascade findings); ICT/Huddleston session framework (attributed teaching). Checked 2026-08-18.