Struct MorningEveningStar 

pub struct MorningEveningStar { /* private fields */ }

Morning Star / Evening Star — a 3-bar reversal pattern.

Morning Star (bullish, +1.0):

1. Bar 1 is a long red candle.
2. Bar 2 has a small body (the “star”) — colour does not matter.
3. Bar 3 is a long green candle that closes above the midpoint of Bar 1.

Evening Star (bearish, −1.0): the mirror image — long green, small body, long red closing below Bar 1’s midpoint.

The “long” qualifier is enforced by requiring the outer bars’ bodies to be at least twice the size of the star’s body. Pattern-shape check only — no trend filter is applied; combine with a trend indicator for actionable signals.

Signed ±1 encoding

This detector already emits the uniform candlestick sign convention shared across the pattern family — +1.0 bullish, −1.0 bearish, 0.0 no pattern — so it drops straight into a machine-learning feature matrix where the bullish and bearish variants of the pattern occupy a single dimension.

Example

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

let mut indicator = MorningEveningStar::new();
indicator.update(Candle::new(12.0, 12.2, 9.5, 10.0, 1.0, 0).unwrap());
indicator.update(Candle::new(9.9, 10.1, 9.7, 9.95, 1.0, 1).unwrap());
let out = indicator
    .update(Candle::new(10.1, 12.0, 10.0, 11.8, 1.0, 2).unwrap());
assert_eq!(out, Some(1.0));

Implementations

impl MorningEveningStar

pub const fn new() -> Self

Construct a new Morning / Evening Star detector.

Trait Implementations

impl Clone for MorningEveningStar

fn clone(&self) -> MorningEveningStar

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MorningEveningStar

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

Formats the value using the given formatter.

impl Default for MorningEveningStar

fn default() -> MorningEveningStar

Returns the “default value” for a type.

impl Indicator for MorningEveningStar

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.