Struct BullishPercentIndex 

pub struct BullishPercentIndex { /* private fields */ }

Bullish Percent Index (BPI) — the percentage of symbols in a universe that are currently on a point-and-figure buy signal.

On each CrossSection tick the value is 100 * on_buy_signal_count / universe size, read from the per-symbol on_buy_signal flag (the caller evaluates each symbol’s point-and-figure chart when it builds the tick). It is a bounded 0..=100 gauge of how many issues are in a confirmed uptrend. Readings above 70 are considered overbought (broad strength, but a crowded market) and below 30 oversold; reversals from those zones are classic BPI buy/sell triggers.

Input = CrossSection, Output = f64 (a percentage in 0..=100), warmup_period == 1. The universe is non-empty by construction, so the share is always defined.

Example

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

let mut bpi = BullishPercentIndex::new();
// 2 of 4 symbols on a buy signal -> 50%.
let tick = CrossSection::new(
    vec![
        Member::with_signals(1.0, 10.0, false, false, false, true),
        Member::with_signals(1.0, 10.0, false, false, false, true),
        Member::with_signals(-1.0, 10.0, false, false, false, false),
        Member::with_signals(-1.0, 10.0, false, false, false, false),
    ],
    0,
)
.unwrap();
assert_eq!(bpi.update(tick), Some(50.0));

Implementations

impl BullishPercentIndex

pub const fn new() -> Self

Construct a new Bullish Percent Index indicator.

Trait Implementations

impl Clone for BullishPercentIndex

fn clone(&self) -> BullishPercentIndex

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BullishPercentIndex

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

Formats the value using the given formatter.

impl Default for BullishPercentIndex

fn default() -> BullishPercentIndex

Returns the “default value” for a type.

impl Indicator for BullishPercentIndex

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.