Concealing Baby Swallow (CDLCONCEALBABYSWALL)

Summary

A four-candle pattern: two black marubozus, then a black candle that gaps down but pokes its upper shadow into the prior body, then a larger black candle fully engulfing the third. A hit signals a bullish reversal.

Notes

Does not verify the preceding downtrend the pattern classically assumes.
Despite the bullish-reversal label, Bulkowski's testing found this pattern actually behaves as a bearish continuation 75% of the time — though the finding rests on just 4 occurrences out of 4.7 million candle lines, and it ranks 101st of 103 patterns overall. (thepatternsite.com)

Inputs

inOpen — Open price of each bar
inHigh — High price of each bar
inLow — Low price of each bar
inClose — Close price of each bar

Outputs

outInteger — +100 on a match, 0 otherwise; never emits -100 (pattern is always bullish)

Output Values

Value	Meaning
0	No pattern
100	Concealing Baby Swallow detected — a bullish reversal signal, most meaningful after a downtrend (unverified by the function)

Properties

Numerical Stability: Start-Independent


☐ Overlap Input
✅ Independent Y-Axis i
✅ Candlestick i
☐ Can Output NaN or ±Inf
☐ Identity at Period 1

Implementation

TA-Lib Definition: cdlconcealbabyswall.c · cdlconcealbabyswall.yaml

Native	File
C	`ta_CDLCONCEALBABYSWALL.c`
Rust	`cdlconcealbabyswall.rs`
Java	`Core_CDLCONCEALBABYSWALL.java`

TA-Lib is also available for Python, R and more using a wrapper.

Aliases

Concealing Baby Swallow