Struct IncrementalBollinger 

pub struct IncrementalBollinger { /* private fields */ }

Incremental Bollinger Bands — per-tick bands over a rolling window.

Mirrors the batch BollingerBands: middle is the period-SMA, the deviation is the sample standard deviation (ddof = 1) over the window, and upper/lower are middle ± std_mult * std (2.0 is the common multiplier). Emits None until period samples are buffered. Unlike the EMA-based incremental structs this keeps a period-length window, so each update is O(period), not O(1).

Implementations

impl IncrementalBollinger

pub fn new(period: usize, std_mult: f64) -> Self

Create incremental Bollinger Bands for the given period and band multiplier (std_mult, conventionally 2.0).

pub fn update(&mut self, price: f64) -> Option<BollingerBandsValue>

Feed the next price; returns the bands once period samples are buffered (and period >= 2, so the sample stddev is defined).

Trait Implementations

impl Clone for IncrementalBollinger

fn clone(&self) -> IncrementalBollinger

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IncrementalBollinger

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

Formats the value using the given formatter.