Struct Hammer 

pub struct Hammer { /* private fields */ }

Hammer — a single-bar bullish reversal candidate.

A Hammer has a small real body sitting near the top of the bar, a long lower shadow at least twice the body, and a short or absent upper shadow. It is traditionally read as a rejection of lower prices.

body         = |close − open|
upper_shadow = high − max(open, close)
lower_shadow = min(open, close) − low
hammer       = lower_shadow >= 2 * body
              && upper_shadow <= body
              && body > 0

Output is +1.0 when the shape matches, 0.0 otherwise. Pattern-shape check only — no trend filter is applied; combine with a trend indicator for actionable signals.

Example

use wickra_core::{Candle, Hammer, Indicator};

let mut indicator = Hammer::new();
// Open 10, close 10.5, low 5, high 10.6: long lower shadow, tiny upper.
let candle = Candle::new(10.0, 10.6, 5.0, 10.5, 1.0, 0).unwrap();
assert_eq!(indicator.update(candle), Some(1.0));

Implementations

impl Hammer

pub const fn new() -> Self

Construct a new Hammer detector.

Trait Implementations

impl Clone for Hammer

fn clone(&self) -> Hammer

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Hammer

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Hammer

fn default() -> Hammer

Returns the “default value” for a type.

impl Indicator for Hammer

type Input = Candle

Type of one input data point (typically f64 for a price, or Candle / Tick).

type Output = f64

Type of one output value.

fn update(&mut self, candle: Candle) -> Option<f64>

Feed one new data point into the indicator and return the freshly computed output, or None if the indicator is still warming up.

fn reset(&mut self)

Reset all internal state, leaving the indicator equivalent to a freshly constructed instance with the same parameters.

fn warmup_period(&self) -> usize

Number of inputs required before the first non-None output can be produced.

fn is_ready(&self) -> bool

Whether the indicator has emitted at least one value since the last reset.

fn name(&self) -> &'static str

Stable, human-readable indicator name. Used by chaining and diagnostics.