NDOG & NWOG Trading: How to Use ICT Opening Gaps as Price Magnets

Every time a new trading day or week opens, there is a gap between the previous close and the new open. In most markets, this gap is small — sometimes just a few ticks. But in ICT trading, these gaps are not noise. They are reference points that act as magnets for price throughout the session. NDOG (New Day Opening Gap) and NWOG (New Week Opening Gap) are two of the most underused tools in the ICT framework, and traders who understand them have a structural edge in identifying where price is heading next.

What Is NDOG?

NDOG stands for New Day Opening Gap. It is the gap between the previous day's closing price and the current day's opening price. In 24-hour markets like forex and crypto, this gap is often very small — sometimes just a pip or two. In equity index futures, the gap can be more pronounced because of the overnight session break.

To be precise:

• Previous day close: The last traded price of the previous daily candle
• Current day open: The first traded price of the new daily candle
• NDOG: The space between these two prices

The NDOG is not just a line — it is a zone. The gap between close and open, however narrow, represents a transition period where market conditions may have shifted (news, overnight flows, sentiment changes). That transition creates a small inefficiency, and price has a tendency to return to it.

What Is NWOG?

NWOG stands for New Week Opening Gap. The concept is identical but applied to the weekly timeframe:

• Previous week close: Friday's closing price (typically 5:00 PM EST for forex)
• Current week open: Sunday/Monday's opening price
• NWOG: The space between these two prices

The NWOG tends to be larger than the NDOG because more time passes between Friday close and Sunday open. Weekend events — geopolitical news, central bank communications, or simply the accumulation of unfilled orders — can create a meaningful gap. This gap carries more weight as a reference point because it represents the entire market's reassessment of value over the weekend.

Why Do NDOG and NWOG Act as Price Magnets?

The magnet effect of opening gaps comes from the concept of efficient price delivery. Markets move to fill inefficiencies. When price opens away from the previous close, it leaves behind a small zone of "undelivered" price — a micro-gap where no actual trading occurred. The market has a strong tendency to return to these zones to fill them.

This is the same principle behind fair value gaps but on a macro scale. An FVG is an inefficiency within a candle sequence. An NDOG or NWOG is an inefficiency between sessions or weeks.

Several forces drive price back to these gaps:

• Market makers need to fill orders left overnight. Many institutional orders are pegged to the previous close, and these need to be executed.
• Mean reversion tendency — price tends to revisit recent value before extending in a new direction.
• Algorithmic trading systems use the previous close and current open as reference points, creating order flow toward these levels.

The result is that on most trading days, price will trade through the NDOG at some point during the session. Not every day — but the statistical tendency is strong enough to build a strategy around.

How to Plot NDOG on Your Chart

Manual Method

1. Switch to a daily chart
2. Note the close of the previous day's candle
3. Note the open of the current day's candle
4. Mark the zone between these two prices on your intraday chart
5. Use a rectangle or shaded zone to highlight the gap

Key Details

• In forex, the daily close/open typically occurs at 5:00 PM EST (New York close). Different brokers may use slightly different times, so verify your platform's daily candle timing.
• In crypto, there is no official close, but most traders use midnight UTC as the daily boundary.
• In equity index futures, the daily gap is between the 4:15 PM close and the 6:00 PM reopen (ES/NQ). The more significant gap for intraday traders is often between the regular trading hours close (4:15 PM) and the next day's regular session open (9:30 AM).

How to Plot NWOG on Your Chart

1. Note Friday's closing price (5:00 PM EST for forex)
2. Note Sunday's opening price (typically 5:00 PM EST Sunday for forex)
3. Mark the zone between these two prices
4. This zone stays relevant for the entire trading week

For equity index futures, the NWOG is the gap between Friday's close and Sunday evening's reopen.

How Do You Trade NDOG?

NDOG as a Session Target

The most straightforward use of NDOG is as a target. When price opens above or below the previous close and begins moving, the gap acts as a magnet — price tends to fill it before making its primary directional move.

The setup:

1. Note the NDOG zone at the start of the day
2. If price opens above the previous close and starts selling, the NDOG is a natural target for the sell-off
3. If price opens below and starts rallying, the NDOG is a target for the rally
4. Once the gap is filled, reassess — price may reverse or continue through

This is especially effective during the first 1-2 hours of the London or New York session, when the initial move of the day often targets the NDOG before establishing direction.

NDOG as Support/Resistance

After the NDOG is filled, the zone can act as support or resistance for the remainder of the session. Price often tests the gap, reacts, and then trends away from it. The gap fill is not just a target — it can be the origin of the day's primary move.

NDOG with Kill Zones

Combining NDOG with ICT kill zones creates a powerful framework:

• London Kill Zone (2:00-5:00 AM EST): If price has not filled the NDOG by London open, the London session often provides the move that fills it. Look for a sweep of overnight liquidity followed by a move toward the gap.
• New York Kill Zone (8:30-11:00 AM EST): If the NDOG was not filled during London, New York often completes the job. The gap acts as a magnet during the NY AM session.

How Do You Trade NWOG?

NWOG as a Weekly Bias Tool

The NWOG provides directional bias for the entire week. If price opens the week above the previous week's close, there is a tendency for price to trade back down to fill the gap at some point during the week. If it opens below, there is a tendency to trade back up.

This does not mean you should blindly trade against the opening direction. It means the NWOG zone is a target — and you can plan your trades knowing that price is likely to visit that zone.

NWOG as a Midweek Magnet

Monday and Tuesday often set up the extremes of the weekly range. By Wednesday, price frequently returns toward the NWOG. This "midweek reversal" pattern is a well-known ICT concept, and the NWOG zone is often where the reversal finds its footing.

NWOG with Higher-Timeframe Levels

When the NWOG overlaps with a higher-timeframe order block, fair value gap, or liquidity level, the zone becomes significantly more important. The gap alone is a reference point; the gap plus institutional confluence is a high-probability trade location.

Which Sessions Matter Most

Not all NDOGs are created equal. The gap between the following sessions carries the most weight:

1. Friday close to Monday open (NWOG): The most significant gap of the week. Weekend reassessment creates real inefficiency.
2. New York close to London open: The gap between the US session close and the European session open often sets up the London kill zone trade.
3. Asian close to London open: The transition from the low-volatility Asian session to the high-volatility London session creates gaps that London frequently targets.

For equity indices, the gap between the regular trading hours close (4:15 PM) and the next day's regular session open (9:30 AM) is the most tradeable NDOG.

How Do You Combine Opening Gaps With FVGs?

NDOG and NWOG zones become especially powerful when they overlap with fair value gaps. If the opening gap zone also contains an FVG from a recent move, you have two independent reasons for price to revisit that area. The FVG is an inefficiency in price delivery; the opening gap is an inefficiency in session transition. Together, they create a zone that price is almost compelled to fill.

Look for this confluence on the 15-minute or 1-hour chart. When an FVG from the previous session sits inside the NDOG zone, that overlap is your high-probability target.

What Do NDOG and NWOG Look Like in Real Markets?

Forex: EUR/USD NDOG Fill During London

EUR/USD closes Tuesday at 1.0845. Wednesday opens at 1.0852 — a 7-pip NDOG. During Asia, price drifts higher to 1.0868. London opens and immediately sells off. Price drops through 1.0852 and fills the NDOG at 1.0845 within the first 90 minutes of London. The gap fill zone acts as support, and price bounces to make a new high at 1.0890 during the New York session.

The trade: short at London open targeting the NDOG fill at 1.0845, then flip long at the gap fill zone targeting the next buy-side liquidity.

Indices: NQ NWOG Midweek Reversal

NQ closes Friday at 18,450. Sunday opens at 18,510 — a 60-point NWOG. Monday rallies to 18,680. Tuesday continues higher to 18,720. Wednesday morning, price reverses hard and sells off through the week. By Thursday, price has returned to 18,450, completely filling the NWOG. The gap fill zone provides support for a bounce into Friday.

The NWOG acted as a magnet for the entire week, and the midweek reversal delivered the move that filled it.

What NDOG and NWOG Mistakes Should You Avoid?

Treating Every Gap as a Guaranteed Fill

While opening gaps have a strong statistical tendency to fill, it is not 100%. Trending markets can leave gaps unfilled for days or even weeks. Use gap fills as targets within a broader framework — not as standalone trade signals. Always combine with session liquidity analysis and market structure.

Using the Wrong Close/Open Times

Different brokers define the daily candle differently. A broker using a GMT close will give you different NDOG values than one using a New York close. For ICT trading, the standard is the New York close (5:00 PM EST). If your broker uses a different time, your NDOG zones will be off, and the magnet effect will be weaker.

Ignoring the Size of the Gap

A 1-pip NDOG on EUR/USD is not the same as a 15-pip NDOG. Tiny gaps have less magnetic pull because there is barely any inefficiency to fill. Larger gaps create more meaningful targets. Focus on gaps that are at least a few pips in forex or a few points in indices.

Overcomplicating the Concept

NDOG and NWOG are reference points — targets and support/resistance zones. They are not entry signals by themselves. Use them to answer the question "where is price likely to go?" and then use other ICT tools — order blocks, breaker blocks, liquidity sweeps — to time your entries.

How Does GrandAlgo Help?

The Smarter Money Suite includes session-based tools that help you visualize key levels from prior sessions, making it easier to identify where NDOG and NWOG zones sit relative to current price action. Combined with the indicator's order block and FVG detection, you can quickly spot where opening gaps overlap with institutional zones.

For planning your intraday sessions around kill zones and gap fills, check the market sessions tool to know exactly when London, New York, and Asia open and close in your timezone. And before any trade, run the numbers through the position size calculator to make sure your risk is properly calibrated to the gap's width.