Struct Apo 

pub struct Apo { /* private fields */ }

Absolute Price Oscillator — the raw difference between a fast and a slow EMA. This is MACD’s line without the signal-EMA — useful when only the momentum-direction reading is needed.

APO_t = EMA(close, fast)_t − EMA(close, slow)_t

Default parameters mirror MACD: (fast = 12, slow = 26). fast must be strictly less than slow.

Example

use wickra_core::{Apo, Indicator};

let mut apo = Apo::new(12, 26).unwrap();
let mut last = None;
for i in 0..80 {
    last = apo.update(100.0 + f64::from(i));
}
assert!(last.is_some());

Implementations

impl Apo

pub fn new(fast: usize, slow: usize) -> Result<Self>

Errors

• Error::PeriodZero if either period is zero.
• Error::InvalidPeriod if fast >= slow.

pub fn classic() -> Self

MACD-style defaults: (fast = 12, slow = 26).

pub const fn periods(&self) -> (usize, usize)

Configured (fast, slow).

Trait Implementations

impl Clone for Apo

fn clone(&self) -> Apo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Apo

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

Formats the value using the given formatter.

impl Indicator for Apo

type Input = f64

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, input: f64) -> 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.