Struct CupAndHandle 

pub struct CupAndHandle { /* private fields */ }

Cup-and-Handle / Inverse — a rounded base (the cup) followed by a shallow pullback (the handle) near the rim, then a breakout in the cup’s direction.

Built on confirmed swing pivots ([SWING_THRESHOLD] = 5%) and read from the last four pivots:

cup-and-handle (bullish, +1):  Rim(high) , Cup(low) , Rim(high) , Handle(low)
  the two rims match (±3%) ; the handle low sits ABOVE the cup low (a shallow
  pullback) and below the right rim

inverse (bearish, -1):         Rim(low) , Cap(high) , Rim(low) , Handle(high)
  the two rims match ; the handle high sits BELOW the cap high and above the
  right rim

The shallow handle (closer to the rim than the cup extreme) is what distinguishes a cup-and-handle from a plain double bottom/top. Output is +1.0 / -1.0 / 0.0; never None.

Implementations

impl CupAndHandle

pub const fn new() -> Self

Construct a new Cup-and-Handle detector.

Trait Implementations

impl Clone for CupAndHandle

fn clone(&self) -> CupAndHandle

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CupAndHandle

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

Formats the value using the given formatter.

impl Default for CupAndHandle

fn default() -> Self

Returns the “default value” for a type.

impl Indicator for CupAndHandle

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.