Struct Rocr 

pub struct Rocr { /* private fields */ }

Rate of Change Ratio (ROCR): close / close[period].

The momentum ratio relative to the price period bars ago: 1.0 means no change, > 1 an advance, < 1 a decline. It is Rocp plus one. Where the reference price is zero the result is reported as 0.

Non-finite inputs are ignored and leave the window untouched; the last computed value is returned instead, matching the SMA / EMA convention.

Example

use wickra_core::{Indicator, Rocr};

let mut indicator = Rocr::new(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 Rocr

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 Rocr

fn clone(&self) -> Rocr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Rocr

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

Formats the value using the given formatter.

impl Indicator for Rocr

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.