Struct AdvanceDecline 

pub struct AdvanceDecline { /* private fields */ }

Advance/Decline Line (A/D Line) — the running cumulative sum of net advancing issues across a universe.

On each CrossSection tick the net breadth is advancers - decliners: the number of symbols with a positive price change minus the number with a negative change (unchanged symbols are ignored). The line accumulates this net value over time, so a rising line means advancers have persistently outnumbered decliners — broad participation — while a falling line warns that a rally is being carried by fewer and fewer names (a breadth divergence when the index itself is still rising).

Input = CrossSection, Output = f64. The line is defined from the very first tick, so warmup_period == 1 and the indicator is ready after one update.

Example

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

let mut ad = AdvanceDecline::new();
// 3 advancers, 1 decliner -> net +2.
let tick = CrossSection::new(
    vec![
        Member::new(1.0, 10.0, false, false),
        Member::new(0.5, 10.0, false, false),
        Member::new(2.0, 10.0, false, false),
        Member::new(-1.0, 10.0, false, false),
    ],
    0,
)
.unwrap();
assert_eq!(ad.update(tick), Some(2.0));

Implementations

impl AdvanceDecline

pub const fn new() -> Self

Construct a new Advance/Decline Line indicator.

Trait Implementations

impl Clone for AdvanceDecline

fn clone(&self) -> AdvanceDecline

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AdvanceDecline

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

Formats the value using the given formatter.

impl Default for AdvanceDecline

fn default() -> AdvanceDecline

Returns the “default value” for a type.

impl Indicator for AdvanceDecline

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.