Struct NewPriceLines 

pub struct NewPriceLines { /* private fields */ }

New Price Lines — the Japanese “shinne” (new-price) exhaustion count: when the close has made count consecutive new highs (or lows), the trend is considered stretched and ripe for a pause or reversal.

consecutive higher closes form "new price lines" up
consecutive lower  closes form "new price lines" down
signal = −1 once `count` consecutive higher closes (overbought / sell warning)
signal = +1 once `count` consecutive lower  closes (oversold / buy warning)
signal =  0 otherwise

Traditional Japanese practice flags eight new price lines (and a stronger ten or twelve) as the point where a directional run becomes exhausted — the market has gone up (or down) so many bars in a row that a corrective pause is statistically due. The signal stays active for every bar the streak remains at or above count, and clears the moment a close breaks the streak.

The first value lands on the second bar (one prior close is needed). The output is +1 / 0 / −1. Each update is O(1).

Example

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

let mut indicator = NewPriceLines::new(8).unwrap();
let mut last = None;
for i in 0..12 {
    let close = 100.0 + f64::from(i); // 11 consecutive higher closes
    let c = Candle::new(close, close, close, close, 1_000.0, 0).unwrap();
    last = indicator.update(c);
}
assert_eq!(last, Some(-1.0));

Implementations

impl NewPriceLines

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

Construct a New Price Lines counter that fires at count consecutive new closes (classic 8, stronger 10/12).

Errors

Returns Error::InvalidPeriod if count < 2.

pub const fn count(&self) -> usize

Configured count threshold.

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

Current consecutive streak (up, down).

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

Current value if available.

Trait Implementations

impl Clone for NewPriceLines

fn clone(&self) -> NewPriceLines

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NewPriceLines

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

Formats the value using the given formatter.

impl Indicator for NewPriceLines

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.