Struct TdCountdown 

pub struct TdCountdown { /* private fields */ }

TD Countdown — standalone 13-bar countdown.

Implementations

impl TdCountdown

pub fn new( setup_lookback: usize, setup_target: usize, countdown_lookback: usize, countdown_target: usize, ) -> Result<Self>

Construct a TD Countdown with explicit lookbacks and targets. The canonical DeMark configuration is setup_lookback = 4, setup_target = 9, countdown_lookback = 2, countdown_target = 13.

Errors

Returns Error::PeriodZero if any argument is zero.

pub fn classic() -> Self

DeMark’s classic configuration: setup lookback = 4, target = 9, countdown lookback = 2, target = 13.

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

Configured (setup_lookback, setup_target, countdown_lookback, countdown_target).

Trait Implementations

impl Clone for TdCountdown

fn clone(&self) -> TdCountdown

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TdCountdown

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

Formats the value using the given formatter.

impl Indicator for TdCountdown

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.