Abandoned Baby (CDLABANDONEDBABY)

Summary

A three-candle reversal pattern: a long body, then a gapped-away doji, then a body of opposite color that gaps back the other way and closes deep into the first body. Bullish (bottom) or bearish (top) reversal signal.

Notes

Does not verify the prior trend the pattern classically assumes for significance.
Bulkowski found the Abandoned Baby both very rare (293 occurrences out of 4.7 million candle lines, frequency rank 92 of 103) and unusually reliable when it does occur (70% success as a reversal, overall performance rank 9 of 103). (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 at a bullish abandoned baby bottom (3rd candle white), -100 at a bearish abandoned baby top (3rd candle black), 0 otherwise; sign = color of the 3rd candle

Output Values

Value	Meaning
-100	Abandoned Baby Top — an isolated doji stranded by gaps on both sides at a high, a rare but strong bearish reversal
0	No pattern
100	Abandoned Baby Bottom — an isolated doji stranded by gaps on both sides at a low, a rare but strong bullish reversal

Parameters

Parameter	Type	Default	Accepted values	Description
`optInPenetration`	real	0.3	≥ 0	Fraction of the 1st candle's real body the 3rd close must penetrate

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: cdlabandonedbaby.c · cdlabandonedbaby.yaml

Native	File
C	`ta_CDLABANDONEDBABY.c`
Rust	`cdlabandonedbaby.rs`
Java	`Core_CDLABANDONEDBABY.java`

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

Aliases

Abandoned Baby