Struct Dx 

pub struct Dx { /* private fields */ }

Wilder’s Directional Movement Index (DX).

DX = 100 · |+DI − −DI| / (+DI + −DI), the un-smoothed precursor to Adx (which is the Wilder average of DX). Both directional indicators are derived from Wilder-smoothed +DM, −DM and true range over period bars, so the first value is emitted after period + 1 candles.

DX ranges over [0, 100]: high when one side of the directional system clearly dominates (a strong trend) and near zero when +DI and −DI are balanced (a range). When both directional indicators are zero — a perfectly flat market — the index returns 0.

Example

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

let mut indicator = Dx::new(5).unwrap();
let mut last = None;
for i in 0..40 {
    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 Dx

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

Errors

Returns Error::PeriodZero if period == 0.

pub const fn period(&self) -> usize

Configured period.

Trait Implementations

impl Clone for Dx

fn clone(&self) -> Dx

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Dx

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

Formats the value using the given formatter.

impl Indicator for Dx

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.