Struct Kst 

pub struct Kst { /* private fields */ }

Pring’s Know Sure Thing — a long-horizon momentum oscillator that combines four ROC series at different lookbacks, each smoothed by its own SMA, summed with Pring’s fixed weights 1, 2, 3, 4:

RCMA_i = SMA(ROC(close, roc_i), sma_i)        for i = 1..=4
KST    = 1·RCMA_1 + 2·RCMA_2 + 3·RCMA_3 + 4·RCMA_4
Signal = SMA(KST, signal_period)

Pring’s recommended defaults are (roc1, roc2, roc3, roc4) = (10, 15, 20, 30), (sma1, sma2, sma3, sma4) = (10, 10, 10, 15), signal_period = 9. Kst::classic() constructs that configuration.

Example

use wickra_core::{Indicator, Kst};

let mut kst = Kst::classic();
let mut last = None;
for i in 0..200 {
    last = kst.update(100.0 + f64::from(i));
}
assert!(last.is_some());

Implementations

impl Kst

pub fn new( roc1: usize, roc2: usize, roc3: usize, roc4: usize, sma1: usize, sma2: usize, sma3: usize, sma4: usize, signal: usize, ) -> Result<Self>

Errors

Returns Error::PeriodZero if any of the nine periods is zero.

pub fn classic() -> Self

Pring’s recommended defaults: KST(10, 15, 20, 30, 10, 10, 10, 15, 9).

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

Configured (roc1, roc2, roc3, roc4, sma1, sma2, sma3, sma4, signal).

Trait Implementations

impl Clone for Kst

fn clone(&self) -> Kst

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Kst

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

Formats the value using the given formatter.

impl Indicator for Kst

type Input = f64

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

type Output = KstOutput

Type of one output value.

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

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.