Candlestick Pattern Recognition

Purpose

Identifies 15 classic candlestick patterns and generates trading signals:

Single-Candle Patterns (5)

Pattern	Signal	Description
Hammer	Bullish	Long lower shadow with a small body at the top
Inverted Hammer	Bullish	Long upper shadow with a small body at the bottom
Shooting Star	Bearish	Long upper shadow with a small body at the bottom (appears after an uptrend)
Doji	Neutral	Open and close are nearly equal
Spinning Top	Neutral	Small body with roughly equal upper and lower shadows

Double-Candle Patterns (5)

Pattern	Signal
Bullish Engulfing	Bullish
Bearish Engulfing	Bearish
Bullish Harami	Bullish
Bearish Harami	Bearish
Piercing Line	Bullish
Dark Cloud Cover	Bearish

Triple-Candle Patterns (4)

Pattern	Signal
Morning Star	Bullish
Evening Star	Bearish
Three White Soldiers	Bullish
Three Black Crows	Bearish

Signal Logic

Bullish patterns score +1, bearish patterns score -1. Go long when the total score is > 0, go short when it is < 0, and stand aside when it equals 0.

Parameters

Parameter	Default	Description
body_pct	0.1	Threshold for body-to-range ratio in a doji
shadow_ratio	2.0	Ratio of shadow length to body length

Dependencies

pip install pandas numpy requests

Signal Convention

• 1 = long, -1 = short, 0 = stand aside