Abandoned baby candlestick: the rare double-gap reversal

The abandoned baby is the most extreme member of the star family. A doji (a session that closes where it opened) is left stranded on its own, separated from the candle before it and the candle after it by price gaps so clean that not even the shadows touch. On a chart it looks like a small cross floating in empty space, an island that the market has "abandoned".

It comes in two directions. The bullish abandoned baby forms at the end of a decline: a long red candle, a doji gapped below it, and a green candle gapped above the doji. The bearish version forms at the end of a rally: a long green candle, a doji gapped above it, and a red candle gapped below. Both are textbook reversal patterns, and both are rare.

This page covers the rules, the reason Finabase's own tools never report the pattern, the single real example our study found in two years of daily bars for 60 large US stocks and ETFs, and what that rarity means for anyone hoping to trade it.

Anatomy of the abandoned baby

Take the bullish case:

1. A long red candle continues a decline.
2. A doji gaps down. Its high is below the red candle's low, so the session traded entirely in new territory, and it closed where it opened.
3. A long green candle gaps up. Its low is above the doji's high, leaving the doji alone between two empty spaces. The green candle closes well into the first candle's body.

The bearish version reverses every direction. What makes the pattern special is the second gap. Plenty of declines gap down into a doji; it is unusual for the very next session to leap back over it without retracing into its range. Western chartists would call the result an island reversal in miniature.

The exact rules Finabase uses

Finabase's detector is TA-Lib's CDLABANDONEDBABY. It returns +100 for the bullish form and −100 for the bearish form, on the third candle, when the following are true (default candle settings, averages over the 10 candles before the one judged):

TA-Lib's default penetration is 0.3. As with its other patterns, the function does not check whether a decline or rally came first; its source says the trend is for the user to judge. Compared with the Morning doji star: the doji version of the bullish star pattern and Evening doji star pattern: a doji at the top of a rally, which only need the bodies to gap, the abandoned baby requires both shadow gaps. Every abandoned baby is therefore also a doji star, but very few doji stars are abandoned babies.

Why Finabase never reports it

The penetration parameter is a multiple of the first candle's body. Finabase supplies 10, the same inherited legacy value it uses for the morning and evening stars, and keeps it so that the new platform reproduces the old app exactly. Ten bodies of follow-through on the third day is far beyond anything a real market produces, so at Finabase's setting the detector found nothing in our study. The app's chart markers, scanner and Signals-tab gauge will not show an abandoned baby. The example below is what TA-Lib finds at its default of 0.3, which the chart link at the top of the page also applies. The Morning star candlestick pattern: rules, examples and test results page has the full arithmetic.

The psychology of a double gap

A gap means the market reopened at a price where no trading took place the day before. Overnight, opinion shifted enough that buyers or sellers were willing to skip a whole range of prices.

In a bullish abandoned baby, the first gap is panic or capitulation: sellers are so eager that the stock opens below the entire previous session. The doji then shows the selling meeting an equal force. The second gap is the reversal of the first. Opinion swings back so decisively overnight that the stock opens above the doji's high and never trades back into its range. Everyone who sold during the doji session sold at the lows.

That combination, a burst of fear followed immediately by a burst of demand, is why the pattern is considered a strong signal in the literature. It is also why it is rare in large, heavily traded US stocks, where daily ranges overlap far more often than not.

Confirmation

The pattern already contains a lot of evidence, but the usual cross-checks still apply:

• The gap holds. For the bullish form, price should stay above the doji's high in the following sessions. A close back inside the doji's range removes the "island".
• A close beyond the third candle in the pattern's direction, the confirmation rule used in our study (a close below the third candle's low for the bearish case).
• Volume expanding on the third candle.
• Context: a long decline or advance into a known level, and momentum, such as the Relative Strength Index (RSI): how to read and use it, at an extreme.

The one real case: IWM, January 2026

The small-cap ETF had risen 2.5% in ten sessions, part of a climb from below $250 in late December. On January 21, 2026 it rose from $264.64 to $267.79, with a high of $268.59. On January 22 it gapped up: the session's low was $269.42, above the prior high, and it closed at $269.79 after opening at $269.83, a doji. On January 23 it gapped down: the session's high was $269.05, below the doji's low, and the ETF closed at $264.81, deep in the January 21 body.

The pattern confirmed the next session with a close of $263.98, below January 23's low. Over the following five sessions IWM fell 1.9%, and within ten sessions it touched $255.05, about 3.7% below the pattern's close. But it recovered, and the ten-session return was +0.1%. A trader shorting the pattern with a stop above the doji's high would have had a small, quick gain available and then a choppy month. Twenty sessions after the pattern the ETF was 1.6% lower.

The same three candles also satisfied TA-Lib's evening doji star and evening star rules, which shows how the stricter pattern sits inside the looser ones.

What the data says

The study covered 60 large US stocks and ETFs from October 30, 2024 to October 29, 2026. For comparison, at the same penetration of 0.3 TA-Lib found 155 morning stars, 154 evening stars, 48 morning doji stars and 50 evening doji stars. The abandoned baby's double shadow gap cut that to one.

Related patterns

An educational outline

Given how rarely the pattern appears, most traders encounter it as a special case of a doji star rather than as a setup to wait for. If one does form, the usual approach looks like this. It is an outline, not a recommendation.

1. Check both gaps on the chart, shadows included. A gap that is closed intraday no longer counts.
2. Look at what came before. An extended move into the doji gives the reversal something to reverse.
3. Use the island as the risk line. For the bearish form, a close above the doji's high puts the stock back on top of the island and invalidates the idea.
4. Expect volatility. Two gaps in three sessions mean the stock is moving more than usual, so the distance to that line may be wide. Size accordingly.

How Finabase shows it

• Charts. The candlestick list includes Abandoned Baby. With Finabase's penetration of 10 it marks nothing. The chart link at the top of this page passes 0.3.
• Scanner. The candlestick scanner sorts a detection onto the Bullish or Bearish list by the sign of TA-Lib's output, +100 or −100. At Finabase's setting both lists stay empty for this pattern.
• Signals tab. The Candlestick gauge on a symbol's Signals tab (for example AAPL) counts the most recent detection of each pattern in the last eight bars as a Buy or Sell vote. The abandoned baby is always a Neutral vote.

Frequently asked questions

What makes a baby "abandoned"?

The two gaps. The doji's whole range, shadows included, is separated from both neighboring candles, so it stands alone on the chart like an island.

Is the abandoned baby the same as an island reversal?

It is a compact version of one. An island reversal can contain many sessions between its two gaps; the abandoned baby has exactly one, and that session must be a doji.

How often does it occur?

Rarely. Across 60 large US stocks and ETFs over two years of daily bars, TA-Lib found one at its default setting, and none at Finabase's setting.

Why can't I find it in the Finabase scanner?

Finabase runs the detector with a penetration of 10, an inherited legacy value that real prices never satisfy. Use the chart link on this page to see what TA-Lib's default finds.

Summary

The abandoned baby isolates a doji between two full gaps, a picture of a market lurching one way, stalling, and lurching back. It is the strictest of the star patterns and one of the rarest in TA-Lib's catalogue: a single case in 29,760 daily bars, and none at all at the penetration Finabase inherited from its legacy app. That one case, on IWM in January 2026, gave a quick dip and then went nowhere. Learn the pattern for what it teaches about gaps and exhaustion, and be skeptical of any reliability figure attached to it.