Key takeaway: The opening range is the high and low NAS100 makes in the first minutes after the US stock market opens at 9:30 New York time. Those two levels become reference points for the rest of the morning: price either breaks out and holds, breaks out and fails, or rotates inside the range. Knowing which of the three is happening keeps you out of the worst trades of the day.

What the opening range is

NAS100 CFDs and Nasdaq 100 futures trade almost around the clock, but the underlying stocks only trade during the US cash session, which opens at 9:30 a.m. Eastern Time. At that moment a large volume of share orders hits the market at once, and the index often makes a sharp first move. The opening range is simply the highest and lowest price traded during a fixed window after that open.

There is no single correct window. Common choices are:

• First 5 minutes: a tight range, many signals, more false breaks.
• First 15 minutes: a balance between speed and reliability.
• First 30 minutes: a wider range that filters noise but sometimes leaves little room to the next target.

Pick one window and use it every day. Switching windows to fit what price did is how traders fool themselves.

Your time zone matters here. 9:30 in New York moves relative to your local time when the US and your country change clocks on different dates. The free NAS100 session clock shows the open in your own time zone and handles daylight saving for you.

The three ways an opening range resolves

1. Break and hold. Price closes outside the range, pulls back to the broken edge, and that edge holds. This is the classic continuation case.
2. Break and fail. Price pokes outside the range, takes the stops that were sitting just beyond it, then closes back inside and moves to the other side. This is a liquidity sweep of the range.
3. Rotation. Price keeps trading back and forth inside the range. Usually the least profitable morning to force trades in.

You cannot know in advance which one you will get. What you can do is define, before the open, what each one would look like on your chart and what you would do in each case.

How RisePips uses the opening range

We do not trade the opening range as a stand-alone breakout system. We use it as context inside the same sequence we always use:

• Before 9:30: mark the higher-timeframe structure and the obvious liquidity: previous day high and low, Asia range, London high and low. Read liquidity on NAS100 if those terms are new.
• During the window: do nothing. Let the range form.
• After the window: watch the edges. A break toward a nearby liquidity pool that agrees with the higher-timeframe bias is interesting. A break that sweeps a level and immediately falls back inside often sets up the move the other way.
• Entry: only after a lower-timeframe break of structure confirms the direction, with the stop beyond the swing that would prove the idea wrong.

A practical walk-through

In general terms: you use a 15-minute opening range. Before the open, the 1-hour chart is bullish and the London high sits a little above current price. Between 9:30 and 9:45 the index trades in a range just under that high.

• At 9:52 price breaks above the range high and through the London high, then keeps making higher lows on the 1-minute chart. It pulls back to the old range high and holds. That is "break and hold" in the direction of the bias: a long idea with a stop below the pullback low.
• Alternatively, price breaks above both highs, stalls, and closes back inside the range with a 1-minute break of structure down. That is "break and fail": the buy stops above the highs were the target. A short idea toward the range low and the Asia high is more logical than buying the breakout.

Common mistakes

• Trading inside the window. The first minutes after the open are the most erratic. Let the range finish.
• Buying every break. On NAS100 the first break of the range is often a sweep. Wait for the hold or the failure to show itself.
• Ignoring the size of the range. If the range is very wide, a breakout trade's stop is wide too. Size down or skip.
• Forgetting news. When a major US data release lands at 8:30 or 10:00 ET, the opening range can be distorted. Check the calendar every morning; our guide to how economic news moves NAS100 explains which releases matter.
• Changing the window after the fact. Decide once. Test it in your journal.

Risk considerations

The open is when NAS100 moves fastest, which means slippage and spread can be larger than at quieter times. Use a stop on every trade, size it from the distance to that stop (the position size calculator does the arithmetic), and set a daily loss limit so one chaotic open cannot do serious damage. If the morning is pure rotation, the best trade is often none.

Where to go next

The opening range sits inside the bigger picture of the trading day. Read the best time to trade NAS100 for how the sessions connect, and NAS100 market structure for the bias that decides which side of the range you favour.