Gap Trading Strategy

A gap in futures trading is the difference between the prior session's regular trading hours (RTH) close and the current session's RTH open. On NQ (Nasdaq 100 E-mini), this means comparing yesterday's 4:00 PM Eastern close to today's 9:30 AM Eastern open. If NQ closed at 21,400 and opens at 21,450, you have a 50-point gap up.

I check the gap every single morning before I do anything else on my charts. Before I look at support and resistance. Before I check news. Before I place a single order across my accounts at Lucid Trading, FundedSeat, YRM Prop, Top One Futures, or FundingPips. The gap tells me what happened overnight while I was sleeping, and more importantly, it gives me a directional bias for the first 30-60 minutes of the session. Some of my cleanest weeks have come from trading nothing but gap fills on NQ.

This guide covers what causes gaps, the four types you need to know, the actual fill statistics, my gap fill setup step by step, gap and go as an alternative, combining gaps with opening range breakouts, when NOT to trade gaps, and how all of this applies to prop firm accounts.

What Causes Gaps in Futures Markets?

Gaps form because of a disconnect between where one session ended and where the next session begins. In stocks, this is straightforward: the market closes at 4:00 PM, reopens at 9:30 AM, and anything that happened overnight (earnings, geopolitical events, economic data) gets priced in at the open. That price jump is the gap.

Futures are different. NQ and ES trade nearly 24 hours, from 6:00 PM Sunday through 5:00 PM Friday with a one-hour daily maintenance break. So technically, there's continuous price discovery. But the gap that matters for day trading is the RTH gap: the difference between yesterday's 4:00 PM close and today's 9:30 AM open. Even though the overnight session (also called Globex or electronic hours) has been trading all night, the 9:30 AM open is when institutional volume floods in, and the RTH close at 4:00 PM is the reference price most algorithms and portfolio managers use.

Common causes for meaningful RTH gaps on NQ and ES:

• Overnight earnings from major tech companies (Apple, NVIDIA, Microsoft)
• Economic data released pre-market (jobs report at 8:30 AM, CPI, GDP)
• Federal Reserve speeches or minutes released after hours
• Geopolitical developments overnight (trade tariffs, conflicts, elections)
• Large moves in Asian or European markets while the US session was closed

The size of the gap matters. A 10-point gap on NQ is noise. A 50-point gap starts to be tradeable. A 200+ point gap after a major event changes the entire character of the session. I generally focus on gaps between 30 and 150 points on NQ, because those fill reliably and offer a workable risk-to-reward ratio.

What Are the Four Types of Gaps?

Not all gaps are created equal. Technical analysis classifies gaps into four categories, and knowing which type you're looking at changes everything about how you trade it.

Common Gaps

These are the most frequent and the most tradeable. Common gaps happen in the normal flow of price action without any major catalyst. The market drifts overnight, opens slightly higher or lower than the prior RTH close, and then gravitates back toward the close price. Common gaps fill at the highest rate of any gap type. On ES, common gaps (defined as gaps under 0.5% of the index value) fill within the session roughly 75-80% of the time.

I trade common gaps almost mechanically. They're the bread and butter of my gap fill setup.

Breakaway Gaps

A breakaway gap occurs when price gaps away from a consolidation zone or key technical level on significant volume. Think of a stock or index that's been trading sideways for two weeks, and then gaps up 1.5% on a massive earnings beat. The gap represents a genuine shift in value. Breakaway gaps have the lowest fill rate of any gap type. Trying to fade a breakaway gap is how traders blow accounts.

You identify a breakaway gap by checking two things: Is price leaving a visible consolidation range? And is volume on the open significantly above average? If both are true, don't fade it.

Runaway (Continuation) Gaps

Also called measuring gaps. These appear in the middle of an established trend. Price has already been moving in one direction, and the gap continues that move. Runaway gaps on NQ typically show up during strong momentum days when overnight futures just keep going in the same direction they closed.

Runaway gaps don't fill during the same session most of the time. They often fill days or even weeks later. For a day trader, the play is to trade WITH the gap, not against it.

Exhaustion Gaps

The trickiest type. An exhaustion gap looks like a runaway gap at first: price has been trending, and now it gaps further in the same direction. But the gap represents the final push of the trend, and price reverses hard. Exhaustion gaps often fill within the same session, sometimes within the first hour.

Telling an exhaustion gap from a runaway gap in real time is difficult. The best clue is divergence: if NQ gaps up but the advance-decline line or volume profile shows weakness, it's more likely an exhaustion gap. I also watch for the gap occurring after a multi-day run of 3+ consecutive trend days. That's when exhaustion gaps are most probable.

What Are the Actual Gap Fill Statistics?

Numbers matter more than theory. Here's what the data shows for ES and NQ based on published studies and my own observations from trading gaps since 2024.

A few things jump out from these numbers. Full gaps (where price opens completely outside yesterday's range) fill more reliably than partial gaps. Gap ups fill slightly better than gap downs. And the overall fill rate for all gap types combined on ES sits around 68-72% for same-session fills, which makes gap fills one of the highest-probability setups in futures trading.

One critical detail: "fill" means price returns to the prior RTH close level. It doesn't mean price stops there. Many gap fills overshoot and continue past the fill level. Your target should be the prior close, with the option to hold runners if momentum continues.

How Do I Trade Gap Fills on NQ and ES?

This is the setup I use most mornings. It's not complicated, but the details matter. I'm going to walk through it step by step.

Step 1: Identify the Gap Before the Open

At 9:25 AM Eastern, I look at two numbers: yesterday's RTH close and the current pre-market price. The difference is my gap. I want to see at least 30 points on NQ or 8 points on ES to consider it a tradeable gap. Anything smaller isn't worth the spread and commission costs.

I also note whether the gap is full or partial. A full gap up means the current price is above yesterday's entire range (above yesterday's high). A partial gap up means the current price is above yesterday's close but still within yesterday's range. Full gaps are my preferred setup because the fill statistics are better.

Step 2: Check the Context

Not every gap is a gap fill candidate. Before I commit, I ask three questions:

Is there a major news event today? FOMC days, NFP days, and CPI days produce gaps that often don't fill because the gap reflects new fundamental information, not just overnight drift. I skip gap fills on these days.

What type of gap is it? If the gap follows a 4-day rally and looks like it could be an exhaustion gap, I'm more interested in fading it. If it's gapping out of a two-week base, that's likely a breakaway gap and I don't want to be on the wrong side.

How does overnight volume look? Thin overnight volume with a small gap = likely common gap = high fill probability. Heavy overnight volume with a large gap = more likely a structural move = lower fill probability.

Step 3: Wait for the Initial Move (Don't Chase the Open)

This is where most traders mess up. They see a gap up and immediately short, or see a gap down and immediately buy. The first 5-10 minutes after the open are chaotic. Spreads widen, order flow is messy, and price can extend the gap before reversing.

I wait for the initial drive. If NQ gaps up 60 points, I expect it to push even higher in the first few minutes as momentum traders pile in. I let that initial impulse play out. My entry signal comes when price shows a reversal toward the fill level.

Reversal signals I watch for: a failed new high on the 5-minute chart, a bearish engulfing candle, VWAP rejection, or the first lower high after the opening push. Any of these can be my trigger.

Step 4: Enter on the Reversal Toward the Fill Level

Once I see reversal confirmation, I enter. For a gap up that I'm fading (shorting), my entry is typically 2-3 candles after the initial push fails. For a gap down that I'm buying, it's 2-3 candles after the initial selloff stalls.

Position size depends on the gap size and my stop distance. On a funded NQ account with a $2,500 trailing drawdown, I'm usually trading 1-2 micros (MNQ) or 1 mini (NQ) depending on the gap size. Smaller gaps mean tighter stops and I can size up slightly. Larger gaps mean wider stops and I size down.

Step 5: Set Target at Prior Close, Stop Beyond Gap Extreme

My primary target is always the prior RTH close. That's the gap fill level. If NQ closed at 21,400 yesterday and opened at 21,460 today, my target on the short is 21,400.

My stop goes above the session high (for a short) or below the session low (for a long). I add 10-15 points of buffer on NQ to avoid getting stopped by a wick. If the opening push on the gap up reached 21,490, my stop sits at 21,505.

This gives me a defined risk-to-reward before I enter. In this example: 60 points of profit potential (21,460 to 21,400) with 45 points of risk (21,460 to 21,505). That's about 1.3:1 R:R, which is acceptable for a 70% win rate setup.

Step 6: Manage the Trade

Once price starts moving toward the fill level, I trail my stop. If NQ drops from 21,460 to 21,430 (halfway to the fill), I move my stop to breakeven. I don't want a winner turning into a loser.

At the fill level (21,400), I take 75% off. The remaining 25% I let ride with a stop at the fill level, because gap fills frequently overshoot into the other direction. If yesterday's close was 21,400 and the gap filled, price might continue down to 21,370 or 21,350. That extra runner can significantly boost the day's P&L.

Gap and Go: The Alternative to Gap Fills

Gap fills aren't the only way to trade gaps. The "gap and go" strategy does the opposite: instead of fading the gap, you trade with it. The idea is that some gaps represent genuine momentum, and price will continue in the gap direction after the open.

Gap and go works best with breakaway gaps and runaway gaps. The setup is straightforward. Price gaps up, you wait for a brief consolidation or pullback in the first 5-15 minutes, and then you buy when price breaks above the opening range high. Your stop goes below the pullback low, and your target is a multiple of the gap size or the next significant resistance level.

I use gap and go less frequently than gap fills, for one reason: the win rate is lower. Gap fills run around 68-72% on ES. Gap and go setups, in my experience, hit closer to 50-55%. The R:R can be better on gap and go trades because the winning moves are often larger, but the inconsistency makes it harder to rely on for prop firm evaluations where consistency matters more than home runs.

When I do trade gap and go, it's usually on days where:

• The gap is above 0.5% on ES or above 100 points on NQ
• Overnight volume is heavy and directional
• There's a clear catalyst (strong earnings, major policy change)
• The gap breaks out of a multi-day consolidation (breakaway gap)

On those days, trying to fade the gap is a losing proposition. The gap represents real demand or real selling, and fighting it will cost you money.

How Do Gaps Work with Opening Range Breakouts?

Gap analysis and opening range breakout (ORB) strategies are natural partners. I wrote a full ORB guide that covers the mechanics in detail, but here's how I combine the two.

When NQ gaps up and the first 15 minutes form a narrow opening range near the gap high, a break below that range is a strong gap fill signal. The logic: buyers tried to push prices higher after the gap but failed to extend the move. The opening range breakdown becomes the entry trigger for the gap fill trade.

When NQ gaps up and the first 15 minutes form a tight range above yesterday's close, a break above that range confirms gap and go momentum. Now the gap and the opening range breakout point in the same direction.

The combined signal (gap direction + ORB direction) filters out a lot of false moves. On mornings where the gap says "up" but the ORB breaks down, I take the gap fill trade with higher confidence. On mornings where both align, I take the gap and go trade with higher confidence. When they conflict (gap up, but ORB breaks up further), I usually wait for more clarity before committing.

Why Do Gaps Matter More in Futures Than Stocks?

Stock traders have been trading gaps for decades. But gaps carry extra weight in futures for a few reasons.

First, RTH gaps on futures are "real" gaps. Even though NQ trades almost 24 hours, the RTH session (9:30 AM to 4:00 PM Eastern) is where roughly 70-80% of total volume occurs. When price gaps at the RTH open, that gap represents the reaction of the majority of market participants to overnight information. The overnight session is thinner and more easily pushed around by small orders.

Second, futures gaps are cleaner. In stocks, gaps can be distorted by earnings announcements, stock splits, dividend adjustments, and pre-market trading on different exchanges with varying liquidity. Futures trade on a single exchange (CME for NQ and ES), the tick data is clean, and the gap calculation is simple: prior RTH close vs. current RTH open.

Third, futures gap fill statistics are more reliable. Because the same institutional players are active every day and the same algorithmic strategies target the same levels, the mean-reversion tendency around gaps is remarkably consistent. The 70% fill rate on ES has held steady across different market regimes over the past decade.

Fourth, for prop firm traders specifically, gap fills are among the safest setups to trade during an evaluation. The risk is pre-defined. The target is clear. The win rate is high. You're not guessing or hoping. You're trading a statistical edge with a defined exit plan, which is exactly what drawdown-based risk management requires.

When Should You NOT Trade Gaps?

Gaps are reliable, but they're not automatic money. There are specific situations where I close my laptop and skip the gap trade entirely.

FOMC Announcement Days. The Federal Reserve announces rate decisions eight times per year, and the market gaps hard on these days. But FOMC gaps behave differently from normal gaps. Price often gaps, fills partially, then reverses again after the actual announcement at 2:00 PM. The fill statistics don't hold on FOMC days because the gap reflects anticipation of an event that hasn't happened yet. I've lost money fading FOMC gaps. Now I don't trade them.

Non-Farm Payrolls and CPI Days. The jobs report comes out at 8:30 AM Eastern, one hour before the futures open. CPI is the same. The gap at 9:30 AM already reflects the data release, but the market is still digesting implications. Gaps on these days are larger than average and fill less reliably. I either skip the gap trade or wait until 10:00 AM for more clarity.

Gaps Over 1% on ES. When ES gaps more than 1% (roughly 50+ points), the gap often represents a genuine shift in market structure. These oversized gaps fill less than 40% of the time within the session. They might fill over the following days or weeks, but that's not a day trade. I don't try to fade monster gaps.

Monday Morning Gaps. Weekends introduce two full days of news accumulation. Monday gaps tend to be larger and more volatile than mid-week gaps. They also have a lower same-session fill rate. I trade Monday gaps more cautiously, often with half my normal size.

Back-to-Back Gap Extensions. If NQ gapped up Monday, gapped up again Tuesday, and is gapping up again Wednesday, that's a trend. Fading the third consecutive directional gap is fighting momentum. I switch to gap and go or sit out entirely on these sequences.

What Makes Gap Trading Ideal for Prop Firm Accounts?

I've passed evaluations and maintained funded accounts across multiple prop firms, and gap trading has been a core part of that process. The reason is simple: gap fills give you everything a prop firm's risk management system rewards.

Defined risk per trade. Prop firms care about drawdown. Gap fills have a natural stop (beyond the gap extreme) and a natural target (prior close). You know your max loss before you enter. That makes position sizing clean and keeps you on the right side of trailing drawdown limits.

High win rate. Most prop firms implicitly require consistency. A 70% win rate strategy means you're booking profits most days, which keeps your equity curve smooth and your drawdown shallow. Compare that to a breakout strategy running 40% win rate with big winners. The breakout strategy might make more money over a full year, but the drawdowns during losing streaks can end your funded account before you get to those big winners.

Quick resolution. Gap fills typically resolve within the first 90 minutes of the session. You're not sitting in a trade all day watching it chop. This matters for prop firms that track consistency or where you want to limit time exposed to the market.

Repeatable edge. Gaps happen almost every day. Not every gap is tradeable, but you get 3-4 solid setups per week. That's enough data to evaluate your process and enough opportunities to compound gains.

One practical tip: start your evaluation by only trading gap fills for the first week. Get a feel for how the firm's platform handles your orders, what the slippage looks like, and how the drawdown resets. Once you've passed phase 1 or have some buffer in your account, you can add other setups.

My Gap Fill Checklist (What I Run Every Morning)

I don't trade gaps from memory. I run the same checklist every morning at 9:25 AM before the RTH open. It takes two minutes.

1. What is the gap size? (Below 30 NQ points = skip. Above 150 = caution.)

2. Full or partial gap? (Full gaps get priority.)

3. Is there a major data release today? (FOMC, NFP, CPI = skip gap fill.)

4. What happened overnight? (Scan headlines for anything that changes the gap's character.)

5. Where is VWAP relative to the gap? (If VWAP is already near the prior close, the fill probability increases.)

6. What did the gap look like yesterday? (Two consecutive gap fills in the same direction = higher probability. Three = be cautious.)

7. What's my max risk on this trade? (Calculate stop distance and position size before the bell.)

That's it. Seven items. If the gap clears all seven, I take the trade. If any item raises a red flag, I either skip or reduce size.

Gap Trading Tools and Indicators

You don't need fancy software to trade gaps. A basic charting platform that shows RTH hours separately from overnight hours is enough. I trade on NinjaTrader and Tradovate (depending on the prop firm), and both display the prior RTH close as a horizontal line.

Useful indicators to supplement gap analysis:

VWAP (Volume Weighted Average Price). The single most useful indicator for gap fills. When price gaps up and trades below VWAP in the first 15 minutes, the gap fill probability increases significantly. VWAP acts as a magnet that pulls price toward it, and on gap fill days, VWAP often sits near the fill level.

Volume profile. Shows where the most volume traded yesterday. If yesterday's point of control (POC) is near the prior close, that level acts as a stronger magnet for the gap fill. If the POC is far from the close, the fill might be less clean.

Overnight high and low. These levels act as support and resistance during the RTH session. If you're fading a gap up and the overnight low sits between the current price and the prior close, expect price to pause or bounce at that level.

ATR (Average True Range). I use the 14-day ATR on NQ to gauge whether a gap is normal or unusual. If the 14-day ATR is 300 points and the gap is 40 points, that's a standard gap. If the gap is 200 points, that's 2/3 of the average daily range and likely too large to fade.

Common Gap Trading Mistakes

I've made all of these. Listing them so you don't have to.

Fading every gap blindly. Not every gap fills. Breakaway gaps can destroy your account if you keep adding to a losing position. Identify the gap type before trading it.

Entering at the open. The first 5 minutes after 9:30 AM are a mess. Spreads widen, orders get ugly fills, and price can extend the gap before reversing. Wait for the initial impulse to play out. Patience costs you nothing. Impatience can cost your funded account.

No stop loss. "It has to fill eventually" is the thought that precedes blown accounts. Some gaps take days or weeks to fill. Your prop firm's drawdown limit doesn't care about statistical probabilities. Set a hard stop.

Ignoring the catalyst. A 50-point gap on NQ after a routine overnight session is completely different from a 50-point gap after a surprise Fed rate cut. Same gap size, totally different trading implications. Context matters as much as the numbers.

Oversizing on "high probability" setups. A 70% win rate means you lose 30% of the time. If you go max size on every gap trade because "gaps always fill," the 30% will wipe out weeks of gains. I never risk more than 1-2% of my account on a single gap trade, even when the setup looks perfect.

The bottom line: a gap trading strategy built around fading common gaps on NQ and ES is one of the most consistent, lowest-risk approaches in futures day trading. The fill statistics are strong, the risk is defined, and the setup happens almost every day. I've used it to pass prop firm evaluations and stay funded across multiple accounts. It won't make you rich on any single trade, but it compounds into something real over weeks and months. If you're looking for a flashy, high-adrenaline strategy, this isn't it. If you want a repeatable edge with clear rules, gap fills belong in your playbook.

Frequently Asked Questions

What is a gap in futures trading?

A gap in futures trading is the price difference between the prior session's regular trading hours (RTH) close and the current session's RTH open. For NQ and ES futures, the RTH close is at 4:00 PM Eastern and the RTH open is at 9:30 AM Eastern. Even though futures trade nearly 24 hours, the RTH gap is the relevant measurement because 70-80% of daily volume occurs during the cash session. A gap up means the market opened higher than it closed, and a gap down means it opened lower.

How often do gaps fill in ES futures?

ES (S&P 500 E-mini) futures fill approximately 68-72% of opening gaps within the same trading session, as of March 2026. Full gap ups have the highest fill probability at roughly 68-72%, while partial gap downs have the lowest at around 50-55%. These statistics apply to common gaps in normal market conditions. Major news-driven gaps, breakaway gaps, and FOMC day gaps fill at significantly lower rates and should be treated as separate categories.

What is the difference between a gap fill and gap and go strategy?

A gap fill strategy involves trading against the gap direction, targeting the prior session's close as your profit target. You are betting the gap will be corrected during the current session. A gap and go strategy does the opposite: you trade in the direction of the gap, expecting momentum to continue beyond the opening price. Gap fills have a higher win rate (roughly 70% on ES) but smaller profit targets. Gap and go setups have a lower win rate (roughly 50-55%) but potentially larger wins when momentum extends. Most prop firm traders benefit from focusing on gap fills due to the higher consistency.

Can you trade gaps on a prop firm evaluation account?

Yes, gap trading is one of the most evaluation-friendly strategies for prop firm accounts. The defined risk (stop beyond the gap extreme) and clear target (prior close) make position sizing straightforward, which helps you stay within trailing drawdown limits. Firms like Lucid Trading, FundedSeat, Top One Futures, and YRM Prop all allow futures day trading strategies that include gap fills. The high win rate also helps maintain a smooth equity curve, which is exactly what evaluation accounts need. Just keep your position size conservative and follow the firm's specific trading rules.

What is the best time to enter a gap fill trade?

The best time to enter a gap fill trade on NQ or ES futures is typically 5-15 minutes after the 9:30 AM Eastern RTH open. Entering immediately at 9:30 AM is risky because spreads are wider, order flow is chaotic, and price often extends the gap further before reversing. Wait for the initial impulse to play out, then look for reversal confirmation: a failed new high on the 5-minute chart, a bearish engulfing candle (for gap up fades), or a VWAP rejection. Most gap fill moves complete within 60-90 minutes of the open.

What size gap is worth trading on NQ?

On NQ (Nasdaq 100 E-mini) futures, gaps between 30 and 150 points are the most tradeable as of March 2026. Gaps under 30 points are too small to justify the spread and commission costs after accounting for slippage. Gaps over 150 points (roughly 0.7% of the index value) often indicate a structural shift rather than a simple overnight imbalance, and they fill less reliably. The sweet spot for consistent gap fill trading on NQ is 40-100 points, which provides enough profit potential to justify the risk while maintaining strong fill probability.

Should you trade gaps on FOMC days?

No. FOMC (Federal Open Market Committee) announcement days produce gaps that behave differently from normal market gaps. The gap before an FOMC announcement reflects market anticipation of a rate decision that hasn't happened yet. Price often gaps, partially fills, then makes a massive directional move after the 2:00 PM announcement. The standard gap fill statistics do not apply on FOMC days. The same caution applies to days with Non-Farm Payrolls (NFP) releases and Consumer Price Index (CPI) reports. Skip the gap trade and wait for the data to be digested.

What is a breakaway gap and how do you identify one?

A breakaway gap is a price gap that occurs when the market moves away from a consolidation zone or key technical level on significantly above-average volume. You identify a breakaway gap by checking two factors: first, was the market trading in a defined range or consolidation pattern before the gap? Second, is the opening volume markedly higher than the 10-day average? If both conditions are met, you're looking at a breakaway gap. Breakaway gaps have the lowest fill rate of any gap type and should not be faded. The correct approach is to trade with the breakaway direction or sit out entirely.

How do I combine gap trading with VWAP?

VWAP (Volume Weighted Average Price) is the most useful companion indicator for gap trading on futures. When NQ gaps up and trades below VWAP during the first 15 minutes of the session, the probability of a gap fill increases because VWAP acts as a price magnet that tends to pull price toward it. For a gap fill trade, check where VWAP is printing relative to the prior close. If VWAP is near the prior close level, that adds confluence to your fill target. Use VWAP rejections (price touching VWAP from below and failing) as confirmation signals for gap fill entries on gap-up days.

What is the difference between common gaps and exhaustion gaps?

Common gaps are routine overnight price differences caused by normal market drift without a major catalyst. They have the highest fill rate (75-80% on ES) and are the safest to trade. Exhaustion gaps occur at the end of an extended trend and represent the final push before a reversal. Exhaustion gaps also tend to fill quickly, often within the same session, but they can initially look like runaway (continuation) gaps that keep extending. The key distinction: if the market has been trending for 3+ consecutive days and gaps further in the same direction on declining volume or with bearish divergence on indicators, it's likely an exhaustion gap rather than a continuation of the trend.

Why do gap down fills have a lower success rate than gap up fills?

Gap down fills have a slightly lower success rate (65-70% vs. 68-72% for gap ups on ES) because of how fear and selling pressure work in markets. When markets gap down, fear drives additional selling in the first minutes of the session, which can extend the gap further before any fill attempt begins. Panic selling tends to be more aggressive and persistent than greed-driven buying on gap-up days. The result is that gap-down days are more likely to produce breakaway gaps or continuation moves that don't fill during the session. Traders fading gap downs should use wider stops and smaller position sizes compared to fading gap ups.

What is a partial gap vs. a full gap?

A full gap occurs when the market opens completely outside yesterday's entire price range. For a full gap up, the open is above yesterday's high. For a full gap down, the open is below yesterday's low. A partial gap occurs when the market opens above or below yesterday's close but still within yesterday's range. Full gaps on ES and NQ have higher fill probabilities (68-72%) compared to partial gaps (50-60%) because full gaps represent a more extreme price dislocation that the market tends to correct. When screening for gap trades, prioritize full gaps over partial gaps for the cleanest setups.

How much should you risk on a single gap trade?

A safe rule is to risk no more than 1-2% of your account equity on any single gap fill trade, even when the setup looks ideal. On a $50,000 funded NQ account with a $2,500 trailing drawdown, that means risking $500-$1,000 per trade. Calculate your stop distance (gap extreme + 10-15 points buffer on NQ), then size your position so that hitting the stop loses no more than your risk limit. A 70% win rate means you still lose 30% of the time. Oversizing on a "sure thing" gap fill is how traders lose weeks of profits in a single morning.

Do gaps work the same way on micro futures contracts?

Yes, gap trading strategies work identically on micro futures contracts like MNQ (Micro Nasdaq) and MES (Micro S&P 500) because the price action mirrors the full-size contracts tick for tick. The only difference is the dollar value per point: MNQ moves $0.50 per tick vs. $5.00 on NQ, and MES moves $1.25 per tick vs. $12.50 on ES. Micro contracts are ideal for gap trading on prop firm evaluation accounts because they allow precise position sizing with smaller risk per contract. Many funded traders use 2-5 micro contracts instead of 1 mini contract for better risk granularity.

Can you automate a gap trading strategy?

Yes, gap trading is one of the most automatable day trading strategies because the rules are mechanical: measure the gap size, identify the type, wait for a reversal signal, enter with a defined stop and target. Platforms like NinjaTrader support automated strategies that calculate the RTH gap at 9:30 AM, filter by size and type, and execute entries based on candlestick patterns or VWAP conditions. However, full automation misses context that matters, like whether the gap is news-driven or whether it's an FOMC day. I run my gap strategy semi-automated: the platform alerts me to qualified gaps, but I confirm the entry manually based on market context.