Struct AdvanceBlock 

pub struct AdvanceBlock { /* private fields */ }

Advance Block — a 3-bar bearish warning: three green candles still pushing to higher closes, but visibly running out of steam — each real body shrinks while the upper shadows lengthen, hinting the advance is about to stall.

all three green & higher closes
each opens inside the prior body
shrinking bodies   (body3 < body2 < body1)
upper shadow of bar3 >= upper shadow of bar2 and bar3 has an upper shadow

Output is −1.0 when the pattern completes and 0.0 otherwise. Advance Block is a single-direction (bearish-only) warning, so it never emits +1.0. The first two bars always return 0.0 because the three-bar window is not yet filled. Pattern-shape check only — no trend filter is applied; combine with a trend indicator for actionable signals.

Signed ±1 encoding

This detector emits the uniform candlestick sign convention shared across the pattern family — −1.0 bearish, 0.0 no pattern — so it drops straight into a machine-learning feature matrix as a single dimension.

Example

use wickra_core::{AdvanceBlock, Candle, Indicator};

let mut indicator = AdvanceBlock::new();
indicator.update(Candle::new(10.0, 13.1, 9.9, 13.0, 1.0, 0).unwrap());
indicator.update(Candle::new(12.0, 14.3, 11.9, 14.0, 1.0, 1).unwrap());
let out = indicator
    .update(Candle::new(13.5, 15.0, 13.4, 14.5, 1.0, 2).unwrap());
assert_eq!(out, Some(-1.0));

Implementations

impl AdvanceBlock

pub const fn new() -> Self

Construct a new Advance Block detector.

Trait Implementations

impl Clone for AdvanceBlock

fn clone(&self) -> AdvanceBlock

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AdvanceBlock

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

Formats the value using the given formatter.

impl Default for AdvanceBlock

fn default() -> AdvanceBlock

Returns the “default value” for a type.

impl Indicator for AdvanceBlock

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.