Struct MacdIndicator 

pub struct MacdIndicator { /* private fields */ }

MACD = EMA(fast) − EMA(slow), with a signal EMA on top.

Standard parameters are fast = 12, slow = 26, signal = 9. The signal EMA is seeded from the first signal raw MACD values, so the first full MacdOutput is emitted after slow + signal − 1 inputs (assuming the slow EMA seeded by then).

Example

use wickra_core::{Indicator, MacdIndicator};

let mut indicator = MacdIndicator::new(3, 6, 3).unwrap();
let mut last = None;
for i in 0..80 {
    last = indicator.update(100.0 + f64::from(i));
}
assert!(last.is_some());

Implementations

impl MacdIndicator

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

Construct a MACD with the given periods.

Errors

Returns Error::PeriodZero if any period is zero, and Error::InvalidPeriod if fast >= slow.

pub fn classic() -> Self

Default (12, 26, 9) configuration, matching every classical chart package.

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

Configured periods as (fast, slow, signal).

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

Most recent fully-computed output if available.

pub fn batch_macd(&mut self, inputs: &[f64]) -> Vec<f64>

Vectorized flat batch for bindings: n * 3 values laid out as [macd, signal, histogram] per input row, warmup rows all NaN.

For a fresh, all-finite slice long enough for a full output it runs the fast EMA, slow EMA and signal EMA as three recurrences fused into a single pass with one allocation — no Option per tick, no per-EMA intermediate buffers, identical SMA-mean seeds (division) and mul_add recurrences. The result is bit-for-bit equal to replaying update. Anything else (not fresh, non-finite, or too short to emit) defers to the exact update replay.

Separate from the trait batch, which stays a bit-identical update replay; only the bindings call this.

Trait Implementations

impl Clone for MacdIndicator

fn clone(&self) -> MacdIndicator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MacdIndicator

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

Formats the value using the given formatter.

impl Indicator for MacdIndicator

type Input = f64

Type of one input data point (typically f64 for a price, or Candle / Tick).

type Output = MacdOutput

Type of one output value.

fn update(&mut self, input: f64) -> Option<MacdOutput>

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.