Struct EmaEngine 

pub struct EmaEngine { /* private fields */ }

Exponential Moving Average (EMA) over the closing price.

Wraps the shared Ema smoother rather than repeating its recurrence, so both surfaces stay one calculation. The first output appears with the period-th bar in either initialisation: with EmaInit::FirstSample the average is already running before that and its early values are withheld, with EmaInit::Sma it is not defined before that at all.

Indicator::reset clears the average and the bar counter, so the next series starts deterministically.

Implementations

impl EmaEngine

pub fn new(period: usize) -> Self

pub fn with_init(self, init: EmaInit) -> Self

Selects the initialisation; see EmaInit. Additive to EmaEngine::new, which keeps the first-sample seed. Indicators that nest EMAs internally (DEMA, TEMA, MACD, …) are deliberately not affected.

pub fn init(&self) -> EmaInit

Trait Implementations

impl Clone for EmaEngine

fn clone(&self) -> EmaEngine

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EmaEngine

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

Formats the value using the given formatter.

impl Indicator for EmaEngine

fn name(&self) -> &str

fn warmup_period(&self) -> usize

fn reset(&mut self)

fn on_bar(&mut self, bar: &Bar) -> Option<IndicatorOutput>

fn alerts(&self) -> Vec<IndicatorAlert>

fn on_checked_bar( &mut self, bar: &Bar, ) -> Result<Option<IndicatorOutput>, BarValidationError>

Validates a bar before forwarding it to Indicator::on_bar.