Sydney session

Sydney opens the trading week and opens each trading day, and both of those facts matter far more than any price action inside the window itself. ### The thinness is structural, not a mood The BIS Triennial Central Bank Survey found that in April 2025 four locations, the United Kingdom, the United States, Singapore and Hong Kong SAR, handled 75 percent of all foreign exchange trading, with the UK alone at around 38 percent and the US around 19 percent ([BIS](https://www.bis.org/press/p250930.htm)). Australia is not among them. When you trade Sydney hours, you are trading a market that most of the world's dealing desks have gone home from. Thin books mean wider spreads and shallower depth. A move that looks meaningful on your chart can be the work of very little real business. A range built on almost no participation draws on the chart exactly like a range built on real flow, and that is the whole trap. ### The FX day rolls over inside this window Swap and rollover are settled at 5pm New York time, which lands right at the top of the Sydney window, and by broker convention it is also where the daily candle closes on many platforms. Spot FX generally settles two business days out (T+2), so a position held past 5pm New York on a Wednesday is treated as opened Thursday, which pushes settlement to Monday, and three days of funding are charged or credited instead of one ([Pepperstone's swaps guide](https://pepperstone.com/en/learn-to-trade/trading-guides/what-are-swaps-how-to-calculate-swaps/)). That is the Wednesday triple swap, and it happens in these hours. ### The daylight saving trap Sydney observes daylight saving from the first Sunday in October to the first Sunday in April ([NSW Government](https://www.nsw.gov.au/about-nsw/daylight-saving)). Tokyo does not observe daylight saving at all. So the Sydney window slides an hour against GMT twice a year while Tokyo stays where it is, and the overlap between them stretches and shrinks with it. If your session boxes are hardcoded in GMT, they are quietly wrong for part of every year. ### Use the hours, do not trade them This is the session for the work, not the swing. Mark the Asian range. Note the highs and lows London so often runs. Write the plan and the invalidation while nothing is moving, so you are not writing them while something is. Forcing setups here is how traders spend their risk budget before the session that actually has volume even opens.