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54194a4ff8c0588dd3b3cb69c9dbe9dc8d438208
wickra/bindings/node/index.js
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kingchenc 54194a4ff8 feat: Family 05 Bands & Channels - 11 new price-envelope indicators (#43) 
* feat(bands-channels): add Family 05 with 11 indicators

Eleven price-envelope overlays organised into a new "Bands & Channels"
family, exposed across all four bindings (Rust core, Python, Node, WASM)
plus fuzz/test/bench/docs coverage:

- MaEnvelope - SMA centerline with fixed-percent envelope (the oldest
  band overlay still in regular use).
- AccelerationBands (Price Headley) - momentum-biased bands that widen
  with the bar's relative range (H - L) / (H + L).
- StarcBands (Stoller Average Range Channel) - SMA(close) +/- k*ATR;
  Keltner's SMA-centerline sibling.
- AtrBands - close-anchored envelope of width k*ATR; the standard
  volatility-targeting stop/target band.
- HurstChannel - SMA centerline wrapped by the rolling high-low range
  (Brian Millard / Hurst-cycle channel).
- LinRegChannel - rolling OLS endpoint +/- k * population stddev of the
  residuals; dispersion about the trend rather than the mean.
- StandardErrorBands - regression line +/- k * OLS standard error
  (denominator n - 2) for prediction-interval bands.
- DoubleBollinger (Kathy Lien) - two concentric BB envelopes
  (typically +/- 1 sigma and +/- 2 sigma) for the zone-partition setup.
- TtmSqueeze (John Carter) - BB-inside-KC squeeze flag paired with a
  detrended-close linear-regression momentum reading.
- FractalChaosBands - Bill Williams 5-bar fractal high/low envelope.
- VwapStdDevBands - cumulative VWAP with volume-weighted population
  standard deviation bands.

Each indicator ships:
- Core impl with the full Indicator trait, classic() where applicable,
  and unit tests (rejects_zero_period / multiplier, accessors, flat
  market, monotonic ordering, batch == streaming, reset, plus
  algebraically verifiable reference values).
- Python PyO3 binding with multi-column NumPy batch (PyArray2).
- Node napi binding with #[napi(object)] struct + interleaved flat
  batch.
- WASM wasm-bindgen binding via Object/Reflect for update +
  Float64Array for batch.
- Fuzz coverage in fuzz_targets/indicator_update{,_candle}.rs.
- Python streaming-vs-batch parametric test + reference test.
- Node streaming-vs-interleaved-batch test + reference test.
- Criterion microbench under crates/wickra/benches/indicators.rs.

README family table, README indicator-count line, and CHANGELOG
Unreleased entry updated: indicator total rises from 71 to 82 across
nine families. Wiki pages are updated in a separate commit in the
wickra.wiki repo.

* test(acceleration-bands): cover sum_hl==0 zero-price guard

Exercises line 104 (`0.0` branch of the `sum_hl == 0.0` guard) which
was the last patch-coverage miss on the family-05 PR. `Candle::new`
accepts a fully-zero bar so the branch is reachable in principle —
add a degenerate-candle unit test to hit it.
2026-05-25 18:37:12 +02:00

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/* tslint:disable */
/* eslint-disable */
/* prettier-ignore */
/* auto-generated by NAPI-RS */
const { existsSync, readFileSync } = require('fs')
const { join } = require('path')
const { platform, arch } = process
let nativeBinding = null
let localFileExisted = false
let loadError = null
function isMusl() {
// For Node 10
if (!process.report || typeof process.report.getReport !== 'function') {
try {
const lddPath = require('child_process').execSync('which ldd').toString().trim()
return readFileSync(lddPath, 'utf8').includes('musl')
} catch (e) {
return true
}
} else {
const { glibcVersionRuntime } = process.report.getReport().header
return !glibcVersionRuntime
}
}
switch (platform) {
case 'android':
switch (arch) {
case 'arm64':
localFileExisted = existsSync(join(__dirname, 'wickra.android-arm64.node'))
try {
if (localFileExisted) {
nativeBinding = require('./wickra.android-arm64.node')
} else {
nativeBinding = require('wickra-android-arm64')
}
} catch (e) {
loadError = e
}
break
case 'arm':
localFileExisted = existsSync(join(__dirname, 'wickra.android-arm-eabi.node'))
try {
if (localFileExisted) {
nativeBinding = require('./wickra.android-arm-eabi.node')
} else {
nativeBinding = require('wickra-android-arm-eabi')
}
} catch (e) {
loadError = e
}
break
default:
throw new Error(`Unsupported architecture on Android ${arch}`)
}
break
case 'win32':
switch (arch) {
case 'x64':
localFileExisted = existsSync(
join(__dirname, 'wickra.win32-x64-msvc.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.win32-x64-msvc.node')
} else {
nativeBinding = require('wickra-win32-x64-msvc')
}
} catch (e) {
loadError = e
}
break
case 'ia32':
localFileExisted = existsSync(
join(__dirname, 'wickra.win32-ia32-msvc.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.win32-ia32-msvc.node')
} else {
nativeBinding = require('wickra-win32-ia32-msvc')
}
} catch (e) {
loadError = e
}
break
case 'arm64':
localFileExisted = existsSync(
join(__dirname, 'wickra.win32-arm64-msvc.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.win32-arm64-msvc.node')
} else {
nativeBinding = require('wickra-win32-arm64-msvc')
}
} catch (e) {
loadError = e
}
break
default:
throw new Error(`Unsupported architecture on Windows: ${arch}`)
}
break
case 'darwin':
localFileExisted = existsSync(join(__dirname, 'wickra.darwin-universal.node'))
try {
if (localFileExisted) {
nativeBinding = require('./wickra.darwin-universal.node')
} else {
nativeBinding = require('wickra-darwin-universal')
}
break
} catch {}
switch (arch) {
case 'x64':
localFileExisted = existsSync(join(__dirname, 'wickra.darwin-x64.node'))
try {
if (localFileExisted) {
nativeBinding = require('./wickra.darwin-x64.node')
} else {
nativeBinding = require('wickra-darwin-x64')
}
} catch (e) {
loadError = e
}
break
case 'arm64':
localFileExisted = existsSync(
join(__dirname, 'wickra.darwin-arm64.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.darwin-arm64.node')
} else {
nativeBinding = require('wickra-darwin-arm64')
}
} catch (e) {
loadError = e
}
break
default:
throw new Error(`Unsupported architecture on macOS: ${arch}`)
}
break
case 'freebsd':
if (arch !== 'x64') {
throw new Error(`Unsupported architecture on FreeBSD: ${arch}`)
}
localFileExisted = existsSync(join(__dirname, 'wickra.freebsd-x64.node'))
try {
if (localFileExisted) {
nativeBinding = require('./wickra.freebsd-x64.node')
} else {
nativeBinding = require('wickra-freebsd-x64')
}
} catch (e) {
loadError = e
}
break
case 'linux':
switch (arch) {
case 'x64':
if (isMusl()) {
localFileExisted = existsSync(
join(__dirname, 'wickra.linux-x64-musl.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.linux-x64-musl.node')
} else {
nativeBinding = require('wickra-linux-x64-musl')
}
} catch (e) {
loadError = e
}
} else {
localFileExisted = existsSync(
join(__dirname, 'wickra.linux-x64-gnu.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.linux-x64-gnu.node')
} else {
nativeBinding = require('wickra-linux-x64-gnu')
}
} catch (e) {
loadError = e
}
}
break
case 'arm64':
if (isMusl()) {
localFileExisted = existsSync(
join(__dirname, 'wickra.linux-arm64-musl.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.linux-arm64-musl.node')
} else {
nativeBinding = require('wickra-linux-arm64-musl')
}
} catch (e) {
loadError = e
}
} else {
localFileExisted = existsSync(
join(__dirname, 'wickra.linux-arm64-gnu.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.linux-arm64-gnu.node')
} else {
nativeBinding = require('wickra-linux-arm64-gnu')
}
} catch (e) {
loadError = e
}
}
break
case 'arm':
if (isMusl()) {
localFileExisted = existsSync(
join(__dirname, 'wickra.linux-arm-musleabihf.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.linux-arm-musleabihf.node')
} else {
nativeBinding = require('wickra-linux-arm-musleabihf')
}
} catch (e) {
loadError = e
}
} else {
localFileExisted = existsSync(
join(__dirname, 'wickra.linux-arm-gnueabihf.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.linux-arm-gnueabihf.node')
} else {
nativeBinding = require('wickra-linux-arm-gnueabihf')
}
} catch (e) {
loadError = e
}
}
break
case 'riscv64':
if (isMusl()) {
localFileExisted = existsSync(
join(__dirname, 'wickra.linux-riscv64-musl.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.linux-riscv64-musl.node')
} else {
nativeBinding = require('wickra-linux-riscv64-musl')
}
} catch (e) {
loadError = e
}
} else {
localFileExisted = existsSync(
join(__dirname, 'wickra.linux-riscv64-gnu.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.linux-riscv64-gnu.node')
} else {
nativeBinding = require('wickra-linux-riscv64-gnu')
}
} catch (e) {
loadError = e
}
}
break
case 's390x':
localFileExisted = existsSync(
join(__dirname, 'wickra.linux-s390x-gnu.node')
)
try {
if (localFileExisted) {
nativeBinding = require('./wickra.linux-s390x-gnu.node')
} else {
nativeBinding = require('wickra-linux-s390x-gnu')
}
} catch (e) {
loadError = e
}
break
default:
throw new Error(`Unsupported architecture on Linux: ${arch}`)
}
break
default:
throw new Error(`Unsupported OS: ${platform}, architecture: ${arch}`)
}
if (!nativeBinding) {
if (loadError) {
throw loadError
}
throw new Error(`Failed to load native binding`)
}
const { version, SMA, EMA, WMA, RSI, DEMA, TEMA, HMA, ROC, TRIX, SMMA, TRIMA, ZLEMA, MOM, CMO, DPO, StdDev, UlcerIndex, VerticalHorizontalFilter, ZScore, MACD, BollingerBands, ATR, Stochastic, OBV, ADX, CCI, WilliamsR, MFI, PSAR, Keltner, Donchian, VWAP, RollingVWAP, AwesomeOscillator, Aroon, KAMA, RVI, PGO, KST, SMI, LaguerreRSI, ConnorsRSI, Inertia, ALMA, McGinleyDynamic, FRAMA, VIDYA, JMA, Alligator, EVWMA, APO, AwesomeOscillatorHistogram, CFO, ZeroLagMACD, ElderImpulse, STC, T3, TSI, PMO, ADL, VolumePriceTrend, ChaikinMoneyFlow, ChaikinOscillator, ForceIndex, EaseOfMovement, SuperTrend, ChandelierExit, ChandeKrollStop, AtrTrailingStop, TypicalPrice, MedianPrice, WeightedClose, LinearRegression, LinRegSlope, AcceleratorOscillator, BalanceOfPower, ChoppinessIndex, TrueRange, ChaikinVolatility, LinRegAngle, BollingerBandwidth, PercentB, NATR, HistoricalVolatility, AroonOscillator, Vortex, MassIndex, StochRSI, UltimateOscillator, PPO, Coppock, VWMA, RVIVolatility, ParkinsonVolatility, GarmanKlassVolatility, RogersSatchellVolatility, YangZhangVolatility, MaEnvelope, AccelerationBands, StarcBands, AtrBands, HurstChannel, LinRegChannel, StandardErrorBands, DoubleBollinger, TtmSqueeze, FractalChaosBands, VwapStdDevBands } = nativeBinding
module.exports.version = version
module.exports.SMA = SMA
module.exports.EMA = EMA
module.exports.WMA = WMA
module.exports.RSI = RSI
module.exports.DEMA = DEMA
module.exports.TEMA = TEMA
module.exports.HMA = HMA
module.exports.ROC = ROC
module.exports.TRIX = TRIX
module.exports.SMMA = SMMA
module.exports.TRIMA = TRIMA
module.exports.ZLEMA = ZLEMA
module.exports.MOM = MOM
module.exports.CMO = CMO
module.exports.DPO = DPO
module.exports.StdDev = StdDev
module.exports.UlcerIndex = UlcerIndex
module.exports.VerticalHorizontalFilter = VerticalHorizontalFilter
module.exports.ZScore = ZScore
module.exports.MACD = MACD
module.exports.BollingerBands = BollingerBands
module.exports.ATR = ATR
module.exports.Stochastic = Stochastic
module.exports.OBV = OBV
module.exports.ADX = ADX
module.exports.CCI = CCI
module.exports.WilliamsR = WilliamsR
module.exports.MFI = MFI
module.exports.PSAR = PSAR
module.exports.Keltner = Keltner
module.exports.Donchian = Donchian
module.exports.VWAP = VWAP
module.exports.RollingVWAP = RollingVWAP
module.exports.AwesomeOscillator = AwesomeOscillator
module.exports.Aroon = Aroon
module.exports.KAMA = KAMA
module.exports.RVI = RVI
module.exports.PGO = PGO
module.exports.KST = KST
module.exports.SMI = SMI
module.exports.LaguerreRSI = LaguerreRSI
module.exports.ConnorsRSI = ConnorsRSI
module.exports.Inertia = Inertia
module.exports.ALMA = ALMA
module.exports.McGinleyDynamic = McGinleyDynamic
module.exports.FRAMA = FRAMA
module.exports.VIDYA = VIDYA
module.exports.JMA = JMA
module.exports.Alligator = Alligator
module.exports.EVWMA = EVWMA
module.exports.APO = APO
module.exports.AwesomeOscillatorHistogram = AwesomeOscillatorHistogram
module.exports.CFO = CFO
module.exports.ZeroLagMACD = ZeroLagMACD
module.exports.ElderImpulse = ElderImpulse
module.exports.STC = STC
module.exports.T3 = T3
module.exports.TSI = TSI
module.exports.PMO = PMO
module.exports.ADL = ADL
module.exports.VolumePriceTrend = VolumePriceTrend
module.exports.ChaikinMoneyFlow = ChaikinMoneyFlow
module.exports.ChaikinOscillator = ChaikinOscillator
module.exports.ForceIndex = ForceIndex
module.exports.EaseOfMovement = EaseOfMovement
module.exports.SuperTrend = SuperTrend
module.exports.ChandelierExit = ChandelierExit
module.exports.ChandeKrollStop = ChandeKrollStop
module.exports.AtrTrailingStop = AtrTrailingStop
module.exports.TypicalPrice = TypicalPrice
module.exports.MedianPrice = MedianPrice
module.exports.WeightedClose = WeightedClose
module.exports.LinearRegression = LinearRegression
module.exports.LinRegSlope = LinRegSlope
module.exports.AcceleratorOscillator = AcceleratorOscillator
module.exports.BalanceOfPower = BalanceOfPower
module.exports.ChoppinessIndex = ChoppinessIndex
module.exports.TrueRange = TrueRange
module.exports.ChaikinVolatility = ChaikinVolatility
module.exports.LinRegAngle = LinRegAngle
module.exports.BollingerBandwidth = BollingerBandwidth
module.exports.PercentB = PercentB
module.exports.NATR = NATR
module.exports.HistoricalVolatility = HistoricalVolatility
module.exports.AroonOscillator = AroonOscillator
module.exports.Vortex = Vortex
module.exports.MassIndex = MassIndex
module.exports.StochRSI = StochRSI
module.exports.UltimateOscillator = UltimateOscillator
module.exports.PPO = PPO
module.exports.Coppock = Coppock
module.exports.VWMA = VWMA
module.exports.RVIVolatility = RVIVolatility
module.exports.ParkinsonVolatility = ParkinsonVolatility
module.exports.GarmanKlassVolatility = GarmanKlassVolatility
module.exports.RogersSatchellVolatility = RogersSatchellVolatility
module.exports.YangZhangVolatility = YangZhangVolatility
module.exports.MaEnvelope = MaEnvelope
module.exports.AccelerationBands = AccelerationBands
module.exports.StarcBands = StarcBands
module.exports.AtrBands = AtrBands
module.exports.HurstChannel = HurstChannel
module.exports.LinRegChannel = LinRegChannel
module.exports.StandardErrorBands = StandardErrorBands
module.exports.DoubleBollinger = DoubleBollinger
module.exports.TtmSqueeze = TtmSqueeze
module.exports.FractalChaosBands = FractalChaosBands
module.exports.VwapStdDevBands = VwapStdDevBands
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