wickra/crates/wickra-core/src/lib.rs

//! `wickra-core`: streaming-first technical indicators.
//!
//! The core engine of Wickra. Every indicator is implemented as a state machine
//! that consumes inputs one at a time via [`Indicator::update`] in constant time.
//! Batch evaluation is provided as a blanket extension trait so the same code
//! path serves both online (tick-by-tick) and offline (historical) workloads.
//!
//! # Design
//!
//! - **Streaming-first.** State is held by the indicator instance, so a new value
//!   only re-computes deltas, not the whole series.
//! - **Batch is free.** [`BatchExt::batch`] is a blanket implementation that
//!   simply replays `update` over a slice. Writing one implementation gives both
//!   APIs.
//! - **Composable.** Indicators implement [`Indicator<Input = f64, Output = f64>`]
//!   wherever they conceptually take a price, so they can be chained via
//!   [`Chain`].
//! - **No `unsafe`.** The crate forbids `unsafe_code` in the workspace lints.
//!
//! # Quick start
//!
//! ```
//! use wickra_core::{BatchExt, Indicator, Sma};
//!
//! // Streaming:
//! let mut sma = Sma::new(3).unwrap();
//! assert_eq!(sma.update(1.0), None);
//! assert_eq!(sma.update(2.0), None);
//! assert_eq!(sma.update(3.0), Some(2.0));
//!
//! // Batch (replays `update` internally):
//! let mut sma = Sma::new(3).unwrap();
//! let out = sma.batch(&[1.0, 2.0, 3.0, 4.0]);
//! assert_eq!(out, vec![None, None, Some(2.0), Some(3.0)]);
//! ```

#![cfg_attr(docsrs, feature(doc_cfg))]
// The libtest harness collects every `#[test]` into a compiler-generated array
// of test references. With 2000+ unit tests that array exceeds clippy's 16 KB
// `large_stack_arrays` threshold; the diagnostic is spanless libtest scaffolding,
// not our code, so it cannot be silenced at a call site. Suppress it only in test
// builds — library code is still linted for genuinely large stack arrays.
#![cfg_attr(test, allow(clippy::large_stack_arrays))]

mod calendar;
mod cross_section;
mod derivatives;
mod error;
mod microstructure;
mod ohlcv;
mod traits;

pub mod indicators;

pub use cross_section::{CrossSection, Member};
pub use derivatives::DerivativesTick;
pub use error::{Error, Result};
pub use indicators::{
    AbandonedBaby, Abcd, AbsoluteBreadthIndex, AccelerationBands, AccelerationBandsOutput,
    AcceleratorOscillator, AdOscillator, AdVolumeLine, AdaptiveCycle, Adl, AdvanceBlock,
    AdvanceDecline, AdvanceDeclineRatio, Adx, AdxOutput, Adxr, Alligator, AlligatorOutput, Alma,
    Alpha, AnchoredRsi, AnchoredVwap, Apo, Aroon, AroonOscillator, AroonOutput, Atr, AtrBands,
    AtrBandsOutput, AtrTrailingStop, Autocorrelation, AverageDailyRange, AverageDrawdown, AvgPrice,
    AwesomeOscillator, AwesomeOscillatorHistogram, BalanceOfPower, Bat, BeltHold, Beta,
    BetaNeutralSpread, BollingerBands, BollingerBandwidth, BollingerOutput, BreadthThrust,
    Breakaway, BullishPercentIndex, Butterfly, CalendarSpread, CalmarRatio, Camarilla,
    CamarillaPivotsOutput, Cci, CenterOfGravity, Cfo, ChaikinMoneyFlow, ChaikinOscillator,
    ChaikinVolatility, ChandeKrollStop, ChandeKrollStopOutput, ChandelierExit,
    ChandelierExitOutput, ChoppinessIndex, ClassicPivots, ClassicPivotsOutput, ClosingMarubozu,
    Cmo, CoefficientOfVariation, Cointegration, CointegrationOutput, ConcealingBabySwallow,
    ConditionalValueAtRisk, ConnorsRsi, Coppock, Counterattack, Crab, CumulativeVolumeDelta,
    CumulativeVolumeIndex, CupAndHandle, CyberneticCycle, Cypher, DayOfWeekProfile,
    DayOfWeekProfileOutput, Decycler, DecyclerOscillator, Dema, DemandIndex, DemarkPivots,
    DemarkPivotsOutput, DepthSlope, DetrendedStdDev, DistanceSsd, Doji, DojiStar, Donchian,
    DonchianOutput, DonchianStop, DonchianStopOutput, DoubleBollinger, DoubleBollingerOutput,
    DoubleTopBottom, DownsideGapThreeMethods, Dpo, DragonflyDoji, DrawdownDuration, Dx,
    EaseOfMovement, EffectiveSpread, EhlersStochastic, ElderImpulse, Ema,
    EmpiricalModeDecomposition, Engulfing, EveningDojiStar, Evwma, FallingThreeMethods, Fama,
    FibonacciPivots, FibonacciPivotsOutput, FisherTransform, FlagPennant, Footprint,
    FootprintOutput, ForceIndex, FractalChaosBands, FractalChaosBandsOutput, Frama, FundingBasis,
    FundingRate, FundingRateMean, FundingRateZScore, GainLossRatio, GapSideBySideWhite,
    GarmanKlassVolatility, Gartley, GrangerCausality, GravestoneDoji, Hammer, HangingMan, Harami,
    HeadAndShoulders, HeikinAshi, HeikinAshiOutput, HiLoActivator, HighLowIndex, HighWave, Hikkake,
    HikkakeModified, HilbertDominantCycle, HistoricalVolatility, Hma, HomingPigeon, HtDcPhase,
    HtPhasor, HtPhasorOutput, HtTrendMode, HurstChannel, HurstChannelOutput, HurstExponent,
    Ichimoku, IchimokuOutput, IdenticalThreeCrows, InNeck, Inertia, InformationRatio,
    InitialBalance, InitialBalanceOutput, InstantaneousTrendline, IntradayVolatilityProfile,
    IntradayVolatilityProfileOutput, InverseFisherTransform, InvertedHammer, Jma, KagiBars,
    KalmanHedgeRatio, KalmanHedgeRatioOutput, Kama, KellyCriterion, Keltner, KeltnerOutput,
    Kicking, KickingByLength, Kst, KstOutput, Kurtosis, Kvo, KylesLambda, LadderBottom,
    LaguerreRsi, LeadLagCrossCorrelation, LeadLagCrossCorrelationOutput, LinRegAngle,
    LinRegChannel, LinRegChannelOutput, LinRegIntercept, LinRegSlope, LinearRegression,
    LiquidationFeatures, LiquidationFeaturesOutput, LongLeggedDoji, LongLine, LongShortRatio,
    MaEnvelope, MaEnvelopeOutput, MacdExt, MacdFix, MacdIndicator, MacdOutput, Mama, MamaOutput,
    MarketFacilitationIndex, Marubozu, MassIndex, MatHold, MatchingLow, MaxDrawdown,
    McClellanOscillator, McClellanSummationIndex, McGinleyDynamic, MedianAbsoluteDeviation,
    MedianPrice, Mfi, Microprice, MidPoint, MidPrice, MinusDi, MinusDm, Mom, MorningDojiStar,
    MorningEveningStar, Natr, NewHighsNewLows, Nvi, OIPriceDivergence, OIWeighted, Obv, OmegaRatio,
    OnNeck, OpenInterestDelta, OpeningMarubozu, OpeningRange, OpeningRangeOutput,
    OrderBookImbalanceFull, OrderBookImbalanceTop1, OrderBookImbalanceTopN, OuHalfLife,
    OvernightGap, OvernightIntradayReturn, OvernightIntradayReturnOutput, PainIndex,
    PairSpreadZScore, PairwiseBeta, ParkinsonVolatility, PearsonCorrelation, PercentAboveMa,
    PercentB, PercentageTrailingStop, Pgo, PiercingDarkCloud, PlusDi, PlusDm, Pmo,
    PointAndFigureBars, Ppo, ProfitFactor, Psar, Pvi, QuotedSpread, RSquared, RealizedSpread,
    RecoveryFactor, RectangleRange, RelativeStrengthAB, RelativeStrengthOutput, RenkoBars,
    RenkoTrailingStop, RickshawMan, RisingThreeMethods, Roc, Rocp, Rocr, Rocr100,
    RogersSatchellVolatility, RollingCorrelation, RollingCovariance, RollingVwap, RoofingFilter,
    Rsi, Rvi, RviVolatility, Rwi, RwiOutput, SarExt, SeasonalZScore, SeparatingLines,
    SessionHighLow, SessionHighLowOutput, SessionRange, SessionRangeOutput, SessionVwap, Shark,
    SharpeRatio, ShootingStar, ShortLine, SignedVolume, SineWave, Skewness, Sma, Smi, Smma,
    SortinoRatio, SpearmanCorrelation, SpinningTop, SpreadBollingerBands,
    SpreadBollingerBandsOutput, SpreadHurst, StalledPattern, StandardError, StandardErrorBands,
    StandardErrorBandsOutput, StarcBands, StarcBandsOutput, Stc, StdDev, StepTrailingStop,
    StickSandwich, StochRsi, Stochastic, StochasticOutput, SuperSmoother, SuperTrend,
    SuperTrendOutput, TakerBuySellRatio, Takuri, TasukiGap, TdCombo, TdCountdown, TdDeMarker,
    TdDifferential, TdLines, TdLinesOutput, TdOpen, TdPressure, TdRangeProjection,
    TdRangeProjectionOutput, TdRei, TdRiskLevel, TdRiskLevelOutput, TdSequential,
    TdSequentialOutput, TdSetup, Tema, TermStructureBasis, ThreeDrives, ThreeInside,
    ThreeLineStrike, ThreeOutside, ThreeSoldiersOrCrows, ThreeStarsInSouth, Thrusting, TickIndex,
    Tii, TimeOfDayReturnProfile, TimeOfDayReturnProfileOutput, TpoProfile, TpoProfileOutput,
    TradeImbalance, TreynorRatio, Triangle, Trima, Trin, TripleTopBottom, Trix, TrueRange, Tsf,
    Tsi, Tsv, TtmSqueeze, TtmSqueezeOutput, TurnOfMonth, Tweezer, TwoCrows, TypicalPrice,
    UlcerIndex, UltimateOscillator, UniqueThreeRiver, UpDownVolumeRatio, UpsideGapThreeMethods,
    UpsideGapTwoCrows, ValueArea, ValueAreaOutput, ValueAtRisk, Variance, VarianceRatio,
    VerticalHorizontalFilter, Vidya, VoltyStop, VolumeByTimeProfile, VolumeByTimeProfileOutput,
    VolumeOscillator, VolumePriceTrend, VolumeProfile, VolumeProfileOutput, Vortex, VortexOutput,
    Vwap, VwapStdDevBands, VwapStdDevBandsOutput, Vwma, Vzo, WaveTrend, WaveTrendOutput, Wedge,
    WeightedClose, WilliamsFractals, WilliamsFractalsOutput, WilliamsR, Wma, WoodiePivots,
    WoodiePivotsOutput, YangZhangVolatility, YoyoExit, ZScore, ZeroLagMacd, ZeroLagMacdOutput,
    ZigZag, ZigZagOutput, Zlema, FAMILIES, T3,
};
// `FootprintLevel` is a row element of `FootprintOutput`, re-exported on its own
// line so the indicator-count tooling (which scans the braced block above and
// strips only `*Output` companions) does not count it as a separate indicator.
pub use indicators::FootprintLevel;
// `MaType` is a moving-average selector enum used by `MacdExt`, re-exported on
// its own line so the indicator-count tooling does not count it as an indicator.
pub use indicators::MaType;
// Bar element types for the alt-chart builders, re-exported on their own lines so
// the indicator-count tooling (which scans only the braced block above) does not
// count them as separate indicators.
pub use indicators::KagiBar;
pub use indicators::PnfColumn;
pub use indicators::RenkoBrick;
pub use microstructure::{Level, OrderBook, Side, Trade, TradeQuote};
pub use ohlcv::{Candle, Tick};
pub use traits::{BarBuilder, BatchExt, Chain, Indicator};