By the time a London trader sits down at 3am New York time, nine hours of Asia trading have already happened, and most of it looks like nothing: EURUSD drifting nine pips wide, GBPUSD barely awake, an hour of chart that would put anyone to sleep. That nine-hour range is not wasted time. It is quietly building the box that London's first real move will break, and reading it correctly gives a trader a genuine head start before the louder sessions even open.
What Asia actually is
The Asia session runs roughly 7pm to 4am New York time, covering Tokyo and Sydney trading hours. Liquidity is real but thin compared to London and New York, and the European majors, EURUSD, GBPUSD, tend to trade a tight, contained range through most of it. The exceptions are the pairs that call Asia home: USDJPY and AUDUSD show genuine directional intent here, since Japanese and Australian institutions are the ones actually at their desks, and treating those two pairs as quiet overnight noise the way you would treat EURUSD is a mistake specific to this session.
The Asia range as a coiled spring
Because volume is thin, the Asia session frequently compresses EURUSD or GBPUSD into a tight box, sometimes 20 pips wide over eight hours, and that compression matters because thin, contained ranges tend to resolve with force once real volume returns. Mark the Asia high and low before London opens. When London's volume arrives around 3am New York time, the first meaningful move is often a break of one side of that box, and the broken side frequently behaves like any other broken level afterward: a support that gave way turns into resistance on a pullback, and vice versa.
Reading the range instead of just marking it
A genuinely narrow, well-behaved Asia range, one where price barely tested either edge, suggests indecision heading into London, and the break when it comes often has real follow-through since almost nobody committed a position beforehand. An Asia range that got tested and rejected multiple times overnight suggests some positioning already happened quietly, and London's break of that range may run into resting orders from traders who faded it several times already. The difference is worth a glance at the overnight chart rather than an assumption that all Asia ranges behave identically.
What not to expect from this session
The temptation is to force a trade during Asia because the chart is open and something should be happening. Resist it on EURUSD and GBPUSD specifically. A 20 pip range does not support a normal stop and target without the trade becoming a coin flip on noise, and spreads, while usually reasonable, eat a bigger share of a small range than they do of a 60 pip London move. USDJPY and AUDUSD traders have more legitimate reason to be active here, but even then, the discipline is trading an actual setup, not trading because the session label says Asia is when your instrument moves.