Dragonfly Doji (CDLDRAGONFLYDOJI)

Summary

Single-candle pattern: a doji (open and close nearly equal) sitting at the top of the range, with no meaningful upper shadow and a long lower shadow. A reversal signal, but its bullish/bearish meaning depends on the prior trend (the code does not judge direction). A hit marks a dragonfly doji; treated as a potential reversal, but direction (bullish/bearish) must be read from the trend it appears in.

Formula

Single candle. realbody <= BodyDoji average (doji body) AND upper shadow < ShadowVeryShort average (no/very short upper shadow) AND lower shadow > ShadowVeryShort average (lower shadow present, not very short). No color, gap, or trend test.

Notes

Does not verify the prior trend that determines the pattern's bullish/bearish meaning.
Bulkowski's testing found this reverses the prior trend only about 50% of the time — statistically no better than a coin flip — and ranks 98th of 103 candlestick patterns for post-breakout performance. (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 when the pattern is present, 0 otherwise; never -100. The +100 does not itself imply bullishness (must be read against the trend)

Output Values

Value	Meaning
0	No pattern
100	Dragonfly Doji detected — a potential reversal; direction (bullish/bearish) must be read from the prevailing trend, which this function does not check

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: cdldragonflydoji.c · cdldragonflydoji.yaml

Native	File
C	`ta_CDLDRAGONFLYDOJI.c`
Rust	`cdldragonflydoji.rs`
Java	`Core_CDLDRAGONFLYDOJI.java`

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

Aliases

Dragonfly Doji