Guide · measured
How to read US 100 order flow
US 100 order flow is the live record of who is buying and selling the US tech-heavy 100-stock index: the resting orders in the order book and the trades that hit them. On Swiftedge you watch it free and 24/7 on the US 100 perpetual future. Over the 60 days to 10 November 2026 (1,440 hourly candles of the perpetual), the New York session carried 60 % of the volume, and the hour of the 09:30 New York stock market open moved 2.1 times as much as an average hour.
What US 100 order flow shows
The US 100 order book heatmap shows resting buy and sell orders as bright bands (walls) around the price; the US 100 footprint chart splits every candle into what was bought and sold at each price. Both are live in Swiftedge Depth for the US 100, on the US 100 perpetual future. It follows the index but is neither the cash index nor exchange-traded index futures, and it trades around the clock, also when US markets are closed.
When the US 100 trades: the numbers
Measured on the 60 days to 10 November 2026 (1,440 hourly candles of the perpetual), open futures-market hours only. Asia from 7:00 PM ET (00:00 UTC), London from 08:00 London time, New York from the 09:30 New York cash open until the 17:00 futures close.
| Session | Share of volume | Average hourly range |
|---|---|---|
| Asia | 21.5 % | 0.29 % |
| London | 18.7 % | 0.31 % |
| New York | 59.8 % | 0.46 % |
The US stock market hours alone, 09:30 to 16:00 New York time on trading days, carried 50.7 % of all the volume. The fixed times, as the hourly candle that contains them against the other open hours:
| Hour containing | Average range | Other hours | Ratio | Days |
|---|---|---|---|---|
| US stock market open (09:30 New York) | 0.70 % | 0.34 % | 2.06× | 42 |
| US stock market close (16:00 New York) | 0.40 % | 0.35 % | 1.15× | 42 |
The open is by far the busiest hour; the close is only a little above average. The three busiest hours were 14:00, 15:00 and 4:00 PM ET (21:00 UTC) (winter time). Today's open and close in your time zone, early closes and holidays are on US 100 trading sessions.
Reading the open
In the minutes before 09:30 New York time, watch the US 100 levels: the previous day's high and low, the overnight (Asia and London) range and the largest walls. At the open, the footprint shows whether the first push was met by size (absorption at a wall) or ran through it. A wall that is pulled as price approaches was never real support; one that trades through slowly while price holds was. None of it predicts the day; it shows who was active.
Weekends and the daily break
US index futures close from Friday 17:00 to Sunday 18:00 New York time and for an hour every weekday evening; the stock market trades only 09:30 to 16:00. The US 100 perpetual keeps trading through all of it: in the futures' closed hours its median volume was 19 % of an open hour and its hourly range 30 % of an open hour's. Weekend moves on the perpetual are a thin-book read of the news, and the Sunday 18:00 reopen often re-prices it.
Common questions
Is there a free US 100 order flow tool?
Yes: Swiftedge, with no sign-up. The US 100 heatmap in Depth, the US 100 footprint chart and US 100 levels today are live on the US 100 perpetual future, 24/7.
Is the US 100 on Swiftedge the same as the index?
No. It is a perpetual future that follows the US tech-heavy 100-stock index and trades around the clock; it is not the cash index or exchange-traded index futures.
When is the US 100 most active?
At the US stock market open: in our 60-day measurement the hour of the 09:30 New York open moved 2.06 times as much as an average hour, and the stock market hours carried half of all volume.
Does the US 100 trade at weekends?
The US 100 perpetual does, 24/7, on low volume. US index futures are closed from Friday 17:00 to Sunday 18:00 New York time.