Struct StdDevChannel 

pub struct StdDevChannel { /* private fields */ }

Standard Deviation Channel — measures how many standard deviations the current close is from the rolling mean of closes.

z = (close - mean(close, period)) / stddev(close, period)

Positive values mean the close is above the channel center; negative values below. The classic ±1 and ±2 levels act as dynamic support/resistance.

Returns SignalValue::Unavailable until period bars have been seen or when standard deviation is zero (flat prices).

Example

use fin_primitives::signals::indicators::StdDevChannel;
use fin_primitives::signals::Signal;

let s = StdDevChannel::new("sdc", 20).unwrap();
assert_eq!(s.period(), 20);

Implementations

impl StdDevChannel

pub fn new(name: impl Into<String>, period: usize) -> Result<Self, FinError>

Creates a new StdDevChannel.

Errors

Returns FinError::InvalidPeriod if period < 2.

Trait Implementations

impl Signal for StdDevChannel

fn name(&self) -> &str

Returns the name of this signal (unique within a pipeline).

fn update(&mut self, bar: &BarInput) -> Result<SignalValue, FinError>

Updates the signal with a BarInput and returns the current value.

fn is_ready(&self) -> bool

Returns true if the signal has accumulated enough bars to produce a value.

fn period(&self) -> usize

Returns the number of bars required before the signal produces a value.

fn reset(&mut self)

Resets the signal to its initial state as if no bars had been seen.

fn update_bar(&mut self, bar: &OhlcvBar) -> Result<SignalValue, FinError>

Convenience wrapper: converts bar to BarInput and calls Self::update.

fn warm_up(&mut self, bars: &[BarInput]) -> Result<SignalValue, FinError>

Feed a slice of historical bars to prime the indicator in one call.