Gap Trading ES and NQ: How to Decide Between Fading and Following

When ES or NQ opens well away from the prior regular-session close, two instincts compete. One says the gap will fill, so fade it. The other says the market has repriced, so follow it. Applied automatically, either one costs money. The useful questions are what kind of gap this is, how big it is relative to normal movement, and how price behaved overnight.

Defining the gap

For day trading, the gap is the difference between the prior regular trading hours (RTH) close and the current RTH open at 9:30 AM ET. Futures trade nearly around the clock on Globex, so the contract doesn't gap in the strict sense, but the RTH to RTH comparison is the reference most day traders use. Confirm the exact session times for the product and any holiday on the CME schedule, because they aren't universal.

• Gap up: RTH open above the prior RTH close.
• Gap down: RTH open below it.
• Gap fill: price trades back to the prior close at some point in the session.

Rather than fixed point labels, size a gap relative to recent movement. Hypothetical example: a 12-point ES gap when the average daily range has been about 60 points is 20% of a typical day. The same 12 points when the average range is 30 points is 40%. The second is a much bigger event. Use your own recent average range, since volatility changes.

About the 'gaps fill 80% of the time' line

You'll see percentages for same-day fill by gap size. I don't have a verified source for any of them, so I won't print them here. They also tend to hide three problems: results differ by period and definition, a fill can come days later, and the statistic doesn't say how far price ran away before filling. A trade that's right eventually can still stop you out first. If you want a fill rate, measure it yourself from clean RTH data using your exact definition, and keep the sample out-of-sample before trusting it.

Classify the gap

Exhaustion gap: follows several days of movement in the same direction and opens into an extended market or a known technical level. Fading may suit it, but that's a hypothesis to test.

Continuation gap: in the direction of an existing trend, often after a consolidation or a data release. Price that holds the gap through the overnight session points toward following.

Common gap: small and without a clear catalyst. Nothing says it should hold, so fades are often tried here.

Breakaway gap: a big move on a fundamental event, such as a policy surprise or a major data miss. The market may have genuinely repriced. Fading it without a specific reason to think the news was overdone is the costliest error in gap trading.

The overnight session decides a lot

Look at what Globex did between the prior close and the open. Hypothetical ES gap up of 12 points:

• Held: overnight price stayed within a few points of the open. Sellers had many hours to push it back and didn't, so following gets more attention than fading.
• Partly filled: price gave back 7 points overnight and recovered. The new level is shaky, and a fill during RTH becomes more plausible.
• Fully filled overnight: there's no gap left to trade by the open.

Treat these as context for your plan, not guarantees. I'm not claiming institutions were buying or selling; I can only see price.

A fade procedure

1. Let the first 15 to 20 minutes after 9:30 ET pass and mark that opening range.
2. Wait for price to push in the gap direction and fail, or to fail to extend.
3. Look for a break back through the range boundary toward the prior close.
4. Enter on a defined trigger, not at a random price between the open and the close.
5. Target the prior close, with a partial near the midpoint if your plan calls for it.
6. Place the stop beyond the early-session extreme. If the fade is right, that extreme should hold.

Risk example (hypothetical): a 10-point stop on 1 ES is $500, and the same stop on 1 MES is $50. Size so that a full stop fits your risk budget; stops can slip, so the actual loss may be larger.

A follow procedure

1. Judge whether the gap came from a catalyst or just overnight drift.
2. Check whether Globex held the gap.
3. Wait for the opening range to form.
4. Enter on the first pullback to VWAP or the opening range edge after an early move in the gap direction.
5. Target a measured extension or the next prior-day level in that direction.

Chasing the first-minute print is the weakest version. The stop then has to sit behind the entire gap, which can be a wide, expensive distance in ES.

Where KPL fits

KPL are fixed reference prices anchored to the RTH opening print, with four levels in the standard ES and NQ map from full-session and after-hours travel. They aren't known before the open, so you can't have them completed for the opening decision, and they don't move once calculated. After the open, you can compare where the prior close sits relative to those levels, and decide whether your fill target is near one. That's a reference, not evidence that a gap is more likely to fill or run.

Common mistakes

• Fading a breakaway gap without examining the catalyst.
• Entering before the opening range forms and getting filled in the noisiest minutes.
• Applying one set of habits in every volatility regime. Re-measure the gap against current average range instead.