Markets are not uniformly active. The same instrument behaves differently at 3am than it does at the open, and trading the wrong hours is a quiet way to lose money without ever making an obviously bad decision.
The three main sessions
Forex and most derivative markets run around the clock across the trading week, structured around three financial centres.
- Asian session, centred on Tokyo, roughly 09:00 to 18:00 Tokyo time
- London session, roughly 08:00 to 17:00 London time
- New York session, roughly 08:00 to 17:00 New York time
The overlaps carry the most activity. London and New York overlap for several hours and account for the majority of daily forex volume.
For Australian traders, the most active hours land in the evening and overnight. London opens around 6pm or 7pm Sydney time depending on daylight saving, and the New York overlap runs through the late evening into the early morning. That is a lifestyle constraint worth confronting before you commit to an instrument.
Equity index hours
Index futures trade nearly 24 hours, with activity concentrated around the cash market.
- US markets open at 09:30 New York time, when volume and volatility rise sharply
- The hour before and after the open carries the most movement
- Midday is typically slower
- The close brings another increase in activity
The ASX trades 10:00 to 16:00 Sydney time, with its own open and close effects.
Why the hour matters
- Spreads widen when volume is thin. The same instrument can cost several times as much to trade at 3am as it does during the London open.
- Volatility clusters. Moves large enough to be worth trading occur disproportionately during active hours.
- Thin markets move erratically. A small order can push price further than it would during active hours, producing movement that looks like a signal and is not.
Scheduled events
Economic releases move markets on a schedule published in advance.
- Interest rate decisions
- Inflation data
- Employment figures, particularly US non-farm payrolls
- Central bank speeches
In the seconds around a major release, spreads widen, slippage increases, and price can travel further in a minute than in the preceding six hours. Many prop firms restrict trading around high-impact news, which is one of the rules that catches people out.
An economic calendar is a basic tool, covered in the Using Tools guide.
Weekends and gaps
Most markets close for the weekend. Crypto does not.
Events continue while markets are shut, so price can reopen at a level substantially different from where it closed, which is a gap. A stop loss sitting in that range does not protect you at its level, because no trading occurred in between. The position closes at the first available price.
This is a reason day traders often prefer to hold nothing over a weekend.
Choosing your hours
Pick a window of two to four hours that you can trade consistently and that coincides with real activity in your instrument. Consistency matters because you are trying to learn how a market behaves, and that requires observing it at the same time repeatedly.
Trading whenever you happen to be free produces a sample of unrelated conditions, from which nothing can be concluded.