Struct Coppock 

pub struct Coppock { /* private fields */ }

Coppock Curve — Edwin Coppock’s long-term momentum indicator.

The Coppock Curve is a weighted moving average of the sum of two rates of change:

Coppock = WMA( ROC(long) + ROC(short), wma_period )

Coppock designed it (1962) as a long-horizon buy signal for stock indices: on a monthly chart with the conventional (long = 14, short = 11, wma_period = 10), a turn upward from below zero has historically marked the start of a new bull phase. The two ROCs blend a slightly longer and a slightly shorter momentum horizon; the WMA smooths the result.

Example

use wickra_core::{Indicator, Coppock};

let mut indicator = Coppock::new(14, 11, 10).unwrap();
let mut last = None;
for i in 0..120 {
    last = indicator.update(100.0 + f64::from(i));
}
assert!(last.is_some());

Implementations

impl Coppock

pub fn new( roc_long_period: usize, roc_short_period: usize, wma_period: usize, ) -> Result<Self>

Construct a new Coppock Curve with the two ROC periods and the WMA period.

Errors

Returns Error::PeriodZero if any period is 0.

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

The (roc_long, roc_short, wma) periods.

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

Current value if available.

Trait Implementations

impl Clone for Coppock

fn clone(&self) -> Coppock

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Coppock

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

Formats the value using the given formatter.

impl Indicator for Coppock

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.