Struct WilliamsFractals 

pub struct WilliamsFractals { /* private fields */ }

Williams Fractals — Bill Williams’ five-bar swing detector. A bar is an up fractal if its high is strictly above the highs of the two bars immediately before and the two bars immediately after. A bar is a down fractal if its low is strictly below the lows of those same four neighbours. Because confirmation requires two bars to the right of the candidate, the indicator inherently lags by two bars.

The first output lands at the fifth candle and corresponds to the third candle (the centre of the window). Subsequent outputs slide the window by one bar.

Example

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

let mut wf = WilliamsFractals::new();
// Build a V-shape with a clear high at index 2.
let highs = [1.0, 2.0, 5.0, 2.0, 1.0];
for (i, &h) in highs.iter().enumerate() {
    let c = Candle::new(h, h, h - 0.5, h, 1.0, i as i64).unwrap();
    let _ = wf.update(c);
}
// At candle 5 the third bar's high of 5.0 is confirmed as an up fractal.

Implementations

impl WilliamsFractals

pub fn new() -> Self

Construct a new Williams Fractals indicator. The window size is fixed at five bars (two left, centre, two right).

Trait Implementations

impl Clone for WilliamsFractals

fn clone(&self) -> WilliamsFractals

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WilliamsFractals

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

Formats the value using the given formatter.

impl Default for WilliamsFractals

fn default() -> Self

Returns the “default value” for a type.

impl Indicator for WilliamsFractals

type Input = Candle

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

type Output = WilliamsFractalsOutput

Type of one output value.

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

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.