Struct BreadthThrust 

pub struct BreadthThrust { /* private fields */ }

Breadth Thrust (Zweig) — a simple moving average of the advancing-issues share, advancers / (advancers + decliners).

Martin Zweig’s breadth thrust smooths the fraction of participating issues that are advancing over a short window (the classic period is 10). A “thrust” fires when this average climbs from below ~0.40 (oversold, washed-out breadth) to above ~0.615 within about ten sessions — historically a rare, reliable signal that a powerful new advance has begun with broad participation.

Each tick’s share floors the participating count to one, so a tick with no advancing or declining issues contributes a defined 0.0 instead of dividing by zero. The reading is None until period ticks have been seen.

Input = CrossSection, Output = f64 (a share in 0..=1), warmup_period == period.

Example

use wickra_core::{BreadthThrust, CrossSection, Indicator, Member};

let mut bt = BreadthThrust::new(2).unwrap();
let up = CrossSection::new(vec![Member::new(1.0, 1.0, false, false)], 0).unwrap();
assert_eq!(bt.update(up.clone()), None); // warming up
assert_eq!(bt.update(up), Some(1.0)); // both ticks 100% advancing

Implementations

impl BreadthThrust

pub fn new(period: usize) -> Result<Self>

Construct a new Breadth Thrust over the given window length.

Errors

Returns Error::PeriodZero if period == 0.

pub const fn period(&self) -> usize

Configured window length.

Trait Implementations

impl Clone for BreadthThrust

fn clone(&self) -> BreadthThrust

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BreadthThrust

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

Formats the value using the given formatter.

impl Indicator for BreadthThrust

type Input = CrossSection

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, section: CrossSection) -> 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.