Struct ProjectionOscillator 

pub struct ProjectionOscillator { /* private fields */ }

Projection Oscillator: where the close sits inside the projection bands, scaled to 0..100.

The companion to ProjectionBands from Mel Widner’s May 1995 Stocks & Commodities article. It maps the close onto the [lower, upper] projection envelope:

PO = 100 · (close − lower) / (upper − lower)

PO = 0 means the close is sitting on the lower band, PO = 100 on the upper band, and PO = 50 at the midline. Because the bands by construction bracket every projected high and low, the close almost always falls inside them and the oscillator stays in 0..100 — readings near the extremes flag an overbought/oversold position relative to the trend-tilted channel rather than to a horizontal level. When the bands collapse (a zero-range window, upper == lower) the position is undefined and the oscillator returns the neutral 50.0.

Example

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

let mut indicator = ProjectionOscillator::new(14).unwrap();
let mut last = None;
for i in 0..30 {
    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 ProjectionOscillator

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

Construct a new Projection Oscillator.

Errors

Returns Error::InvalidPeriod if period < 2.

pub const fn period(&self) -> usize

Configured period.

Trait Implementations

impl Clone for ProjectionOscillator

fn clone(&self) -> ProjectionOscillator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProjectionOscillator

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

Formats the value using the given formatter.

impl Indicator for ProjectionOscillator

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.