Struct VolumePriceTrend 

pub struct VolumePriceTrend { /* private fields */ }

Volume-Price Trend — a cumulative volume line weighted by percentage price change.

VPT is a close relative of Obv, but instead of adding the full bar volume on every up-close it adds volume scaled by the size of the move:

VPT_t = VPT_{t−1} + volume_t · (close_t − close_{t−1}) / close_{t−1}

A big move on heavy volume moves the line far; a small move on the same volume barely nudges it. The running total is unbounded — its slope and its divergence from price are what carry the signal. The first bar establishes the baseline at 0.

Example

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

let mut indicator = VolumePriceTrend::new();
let mut last = None;
for i in 0..80 {
    let base = 100.0 + f64::from(i);
    let candle =
        Candle::new(base, base + 2.0, base - 2.0, base + 1.0, 10.0, i64::from(i)).unwrap();
    last = indicator.update(candle);
}
assert!(last.is_some());

Implementations

impl VolumePriceTrend

pub const fn new() -> Self

Construct a new Volume-Price Trend starting at zero.

pub const fn value(&self) -> Option<f64>

Current cumulative value if at least one candle has been ingested.

Trait Implementations

impl Clone for VolumePriceTrend

fn clone(&self) -> VolumePriceTrend

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VolumePriceTrend

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

Formats the value using the given formatter.

impl Default for VolumePriceTrend

fn default() -> VolumePriceTrend

Returns the “default value” for a type.

impl Indicator for VolumePriceTrend

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.