Struct HammerPattern 

pub struct HammerPattern { /* private fields */ }

Hammer Pattern — detects bullish hammer and bearish hanging man candlestick patterns.

A hammer (bullish reversal, output +1) has:

• Small body in the upper portion of the range
• Lower shadow ≥ 2× the body size
• Little or no upper shadow (upper shadow ≤ 30% of total range)

A hanging man (bearish reversal, output -1) has the same shape but occurs in an uptrend context. Since this indicator is stateless (no trend context), it outputs +1 for any hammer-shaped bar and -1 if inverted (small body in lower portion, long upper shadow).

Outputs 0 if no pattern is detected.

Always ready from the first bar.

Example

use fin_primitives::signals::indicators::HammerPattern;
use fin_primitives::signals::Signal;

let hp = HammerPattern::new("hp").unwrap();
assert_eq!(hp.period(), 1);

Implementations

impl HammerPattern

pub fn new(name: impl Into<String>) -> Result<Self, FinError>

Errors

Never errors — provided for API consistency.

Trait Implementations

impl Signal for HammerPattern

fn name(&self) -> &str

Returns the name of this signal (unique within a pipeline).

fn period(&self) -> usize

Returns the number of bars required before the signal produces a value.

fn is_ready(&self) -> bool

Returns true if the signal has accumulated enough bars to produce a value.

fn update(&mut self, bar: &BarInput) -> Result<SignalValue, FinError>

Updates the signal with a BarInput and returns the current value.

fn reset(&mut self)

Resets the signal to its initial state as if no bars had been seen.

fn update_bar(&mut self, bar: &OhlcvBar) -> Result<SignalValue, FinError>

Convenience wrapper: converts bar to BarInput and calls Self::update.

fn warm_up(&mut self, bars: &[BarInput]) -> Result<SignalValue, FinError>

Feed a slice of historical bars to prime the indicator in one call.