Trading fair value gaps: spot imbalance as it forms

Most traders don't need more lines on the chart — they need cleaner imbalance context. The Trading123 Fair Value Gap Indicator is built for NinjaTrader users who want to spot market imbalance as it forms, without manually marking every gap by hand.

It automatically detects bullish and bearish fair value gaps, tracks each gap until price fills it, and cuts the chart noise that comes from treating every displacement the same. This guide covers what a fair value gap actually is, how the indicator handles them, and how to fold that context into your plan.

What is a fair value gap?

A fair value gap (FVG) is a three-candle price imbalance left behind by a strong, one-directional move. When price accelerates so quickly that the middle candle's range is not fully overlapped by the wicks of the candles on either side, it leaves a small window of "unfilled" price — an area the market moved through inefficiently.

In a bullish fair value gap, the gap sits between the high of the first candle and the low of the third candle after a sharp rally. In a bearish fair value gap, it sits between the low of the first candle and the high of the third candle after a sharp drop. Traders watch these zones because price often revisits them before continuing, giving a reference point for where imbalance was created.

What the indicator does

Instead of scrolling back and drawing rectangles by hand, the Fair Value Gap Indicator handles the mechanical work for you. It watches completed candles, flags qualifying imbalances the moment they form, and keeps each one on the chart until price trades back through it.

The workflow improvements are straightforward:

• Bullish and bearish FVGs identified automatically as they form, with no manual marking.
• Open gaps stay visible on the chart until price fills them.
• Filled gaps are resolved and removed from the active context, so you only see what still matters.
• Chart clutter is reduced because the tool stops treating every small displacement as equally important.
• Trade location is easier to evaluate around clearly marked imbalance zones.

How to use fair value gaps in your plan

The key point to keep in mind: fair value gaps don't predict the next move. They show where price moved inefficiently and whether that area still matters to your plan. An open gap is a zone of interest — a place where price may react — not a signal to buy or sell on its own.

Most traders use FVGs as context rather than triggers. You might watch how price behaves as it returns to an unfilled gap, combine gap zones with your existing levels, or use a filled gap as confirmation that an imbalance has been resolved. Pairing FVGs with order flow tools such as the Volume Delta indicator can add another read on who is actually pressing at those zones.

Watch the walkthrough

Prefer to see it on a live chart? There's a short walkthrough video that shows the indicator detecting and tracking gaps in real time on NinjaTrader 8.

Frequently asked questions about fair value gaps

What is a fair value gap?

A fair value gap is a three-candle price imbalance left behind when a strong move pushes price so quickly that the middle candle's range is not overlapped by the wicks of the candles on either side. It marks an area price moved through inefficiently, leaving unfilled orders behind.

Does the indicator repaint?

No. Gaps are drawn from completed candles and stay on the chart until price fills them. A gap does not appear, move, or disappear retroactively once the candles that formed it have closed.

Which markets and charts does it work on?

The Fair Value Gap Indicator runs on NinjaTrader 8 and works on futures markets such as ES and NQ, as well as any chart type — minute, tick, range, or Renko.

Do fair value gaps predict price?

No. Fair value gaps do not predict the next move. They mark where price moved inefficiently and show whether that area still matters. Use them as context within your own trading plan, not as standalone buy or sell signals.