Three black crows: meaning, TA-Lib rules and real examples

Three black crows are three red candles in a row, each opening inside the previous one's body and each closing near its low, with every close lower than the last. Appearing after a rally, they describe sellers taking over methodically: no panic gap, no single crash, just three sessions in which every bounce was sold and every close was weak.

The name is a piece of market folklore. Crows perched in a row were an omen of bad luck, and on a black-and-white chart the three dark candles stepping down look like birds on a descending branch. The pattern is the bearish twin of Three white soldiers candlestick pattern: rules and real results.

This page explains the textbook pattern and the exact test TA-Lib runs, which quietly needs a fourth candle. It then walks through two real cases and reports what our two-year study found. The short answer: the pattern is rare, with four detections on 60 large US stocks and ETFs, so the data cannot say whether it works.

Anatomy of three black crows

The parts:

• A preceding up day. The pattern is meant to end a rally, so the candle before the first crow is typically green. TA-Lib makes this a hard requirement.
• Crow one. A red candle that closes near its low, below the high of that preceding green candle.
• Crow two. Opens inside crow one's body, falls, and again closes near its low, below crow one's close.
• Crow three. The same again, opening inside crow two's body and closing lower still.

Three consecutive red candles happen all the time. What makes these "crows" is the discipline: opens inside the previous body (no relief gaps) and closes at the lows (no afternoon recovery). Nison also cautions that crows with very long bodies can leave a market oversold after just three sessions, so they are not a guarantee of more decline.

The exact rules Finabase uses

Finabase's detector is TA-Lib's CDL3BLACKCROWS. It returns −100 on the third crow when all of these conditions hold, with TA-Lib's default candle settings:

Compared with the usual description:

• A four-candle pattern in practice. Because of the green-candle requirement, TA-Lib looks at four sessions, not three. A string of red candles that follows another red candle never qualifies, however textbook the crows look.
• No body-size test. The crows don't have to be long. Three narrow red candles with closes at their lows pass, as long as the opens and closes line up.
• No real trend test. The source comment says the pattern matters after a mature advance or at high levels, and that the function does not check. A single green day in the middle of a decline is enough to satisfy the code.
• The lower-shadow rule is strict. Each crow must close within a tenth of a typical day's range of its low. That, more than anything, is why detections are rare.

What the crows are telling you

Think about who is trading during each crow. On day one, sellers take the stock down from near the prior day's level to a close at the session low. Buyers who bought the previous green candle are now losing money.

On day two, the stock opens inside day one's body, a small bounce from the low. That bounce is sold, and the stock again closes at its low. The same happens on day three. Each morning brings a modest recovery attempt and each afternoon erases it. Three consecutive closes at the low say that holders were willing to sell into the close every day, which suggests distribution rather than a one-off reaction to news.

What the pattern does not show is how much further the selling will go. Three closes at the low can also mean the selling is front-loaded and close to exhausted, which is the oversold risk Nison warns about.

Confirmation

Traders usually want one or more of these before treating crows as a reversal:

• A further close below the third crow's low, the rule our test uses.
• Location: crows forming from a prior high or a resistance level, after a sustained advance.
• Volume rising across the three sessions.
• Momentum rolling over, for example the Relative Strength Index (RSI): how to read and use it falling back from overbought readings.

The real cases

DIA, December 9, 2024 (worked). The Dow ETF had edged up 0.4% over ten sessions and closed green on December 4 at $450.94. Then came three crows: December 5 ($450.48 to $448.67), December 6 ($449.49 to $447.15) and December 9 ($447.65 to $445.08), each opening inside the previous body and closing near its low. The decline did not stop there. DIA closed lower in ten straight sessions from December 5 to December 18, the last of them a 2.6% drop on the day of the Federal Reserve's December meeting. Five sessions after the pattern it was 1.5% lower, and after ten it was down 3.6%.

Eli Lilly, February 11, 2026 (failed). After a green candle on February 6, Lilly opened above $1,077 on February 9 and fell to $1,044.67, then lost ground again on February 10 and 11, closing at $1,015.21. All three crows opened inside the prior body. But the stock had already slipped 0.8% over the previous ten sessions, so this was not the end of a rally. The very next session it rose 2.3%, and five sessions after the pattern it was 0.8% higher. A crow pattern that forms after a decline, rather than after an advance, has lost the context that gives it meaning; TA-Lib's single-green-candle check could not tell the difference.

The two other detections, Procter & Gamble on September 22, 2025 and Costco on July 22, 2025, also formed after 10-session declines of 3.7% and 4.5%. Both confirmed with a further lower close; P&G was 1.7% lower ten sessions later, and Costco 0.2% higher.

What the data says

The study ran CDL3BLACKCROWS over daily bars from October 30, 2024 to October 29, 2026 for 60 large US stocks and ETFs, 29,760 day-samples. A hit is a lower close five sessions after the pattern.

Only one of the four (25%) formed after a 10-session rise, the condition the textbooks ask for. That was DIA, the case that worked best.

Three black crows versus related patterns

An educational outline for trading it

The following is an outline of how the pattern is commonly approached, for learning only. It is not a recommendation, and the numbers are made up.

1. Insist on a rally first. TA-Lib accepts one green candle; a meaningful advance into resistance is what the pattern was named for.
2. Look at the size of the crows. Very long crows can leave the stock stretched and prone to a bounce.
3. Decide whether to wait for a further close below the third crow's low.
4. Place the invalidation level above the first crow's open or the high before it. A recovery to there would undo all three sessions.
5. Size from that distance. Because the stop sits above three days of decline, it is often far away.

How Finabase shows three black crows

• Charts. Three Black Crows (CDL3BLACKCROWS) is in the chart's candlestick list. Adding it marks the third crow of every detection.
• Scanner. The candlestick scanner sorts each detection by the sign of TA-Lib's output. Three black crows always return −100, so they appear on the Bearish list.
• Signals tab. On each symbol's Signals tab (for example AAPL), the Candlestick gauge gives every pattern one vote from its most recent detection in the last eight bars. A three-black-crows detection is a Sell vote.

Frequently asked questions

Are three black crows always bearish?

TA-Lib always scores them −100, but the reading depends on context. After a long rally they are a potential top. After a decline they mostly describe selling that has already happened, as Eli Lilly's February 2026 case shows.

What is the difference between three black crows and identical three crows?

Where each crow opens. In three black crows each opens inside the previous red body; in Identical three crows: the no-relief bearish pattern each opens at, or very near, the previous close. TA-Lib's black crows also need a green candle first; the identical version does not.

Why does TA-Lib need a fourth candle?

To approximate "after a rally". It checks that the candle before the first crow is green and that the first crow closes below that candle's high. It is a crude stand-in for a trend test.

How often does the pattern appear?

Rarely in TA-Lib's form. In our study it fired four times in 29,760 daily bars, mainly because each crow must close within 10% of a typical day's range of its low.

Summary

Three black crows show a market stepping down in disciplined fashion: three red candles, each opening inside the last body and closing at its low. TA-Lib adds a fourth condition, a green candle just before the crows, but no real trend or size test, and its strict lower-shadow rule makes the pattern rare. Our study found only four cases, which is nowhere near enough to measure reliability; the one textbook case, on DIA in December 2024, was the one that worked. If you use the pattern, supply the context TA-Lib omits, a real rally into resistance, and decide in advance where the crows would be proven wrong.