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## 0.22.3 (2026-03-01)
### Added
- **Bill Williams indicator suite**: Added `FractalHighIndicator`, `FractalLowIndicator`, `AlligatorIndicator` (jaw/teeth/lips defaults), `GatorOscillatorIndicator` (upper/lower histogram branches), and `MarketFacilitationIndexIndicator` with comprehensive regression coverage for confirmation delays, overlapping windows, flat-price/zero-volume edge cases, constructor validation, unstable-bar boundaries, and lower-histogram signed-zero handling.
- **Risk controls APIs**: Added `PositionRiskModel`, `StopLossPositionRiskModel`, and `RMultipleCriterion` for risk-unit (R-multiple) evaluation, plus `StopLossPriceModel`/`StopGainPriceModel` and fixed/trailing/volatility/ATR stop-loss and stop-gain rule variants.
- **Agent guidance tooling and docs**: Reorganized project `AGENTS.md` into scoped, task-local guides and added `scripts/agents_for_target.sh` to resolve effective instructions for any target path.
- **Regression coverage additions**: Added explicit tests for `TimeBarBuilder` gap placement, `NetMomentumIndicator` pivot/decay edge handling, mixed-field serialization routing, named-strategy label/vararg diagnostics, and `VolumeIndicator` rolling-window behavior.
- Added **PiercingLineIndicator** and **DarkCloudCoverIndicator** with configurable body-size, gap, and penetration thresholds for candlestick pattern detection.
- **Trend confirmation oscillators**: Added `VortexIndicator` (+VI, -VI, and oscillator output) and `UltimateOscillatorIndicator` with configurable periods, warm-up guards, and regression tests against published reference values.
- **Volatility-normalized MACD-V toolkit**: Added `VolatilityNormalizedMACDIndicator` with canonical ATR-normalized MACD-V calculation, configurable signal/histogram helpers, and `MACDVMomentumState` classification utilities.
- **MACD-V momentum helper components**: Added `MACDHistogramMode`, `MACDLineValues`, `MACDVMomentumProfile`, `MACDVMomentumStateIndicator`, and `MomentumStateRule` to support configurable histogram polarity, bundled line snapshots, and momentum-state rule composition.
- **MACD-V strategy demo**: Added `MACDVMomentumStateStrategy` to `ta4j-examples`, demonstrating custom signal-line injection and momentum-state filtered entry/exit rules.
### Changed
- **Risk/stop-rule refinements**: Tightened volatility stop-gain coefficient validation, removed redundant risk recomputation in `RMultipleCriterion`, added the missing `AverageTrueRangeTrailingStopLossRule` lookback overload, and expanded shared stop-rule fixtures/tests and Javadocs.
- **VolumeIndicator performance**: Replaced O(barCount) per-index summation with an O(1) rolling partial-sum update, including clearer algorithm/complexity Javadocs.
- **Serialization routing precedence**: `ComponentSerialization` now resolves mixed payloads by descriptor type so strategies prefer `rules` while indicators/rules prefer `components`, while keeping legacy `children`/`baseIndicators` compatibility.
- **NamedStrategy reconstruction diagnostics**: Strategy reconstruction now emits richer, label-aware errors for missing identifiers, malformed labels, and constructor/parameter failures.
- **Build entrypoint + Maven Wrapper compatibility**: `scripts/run-full-build-quiet.sh` now auto-detects and uses
`./mvnw` when present (falling back to `mvn`), so wrapper adoption does not require a second build command.
- **Full build script portability**: `scripts/run-full-build-quiet.sh` no longer requires Python; timeout handling,
quiet-output filtering, heartbeat logging, and test-summary aggregation now run in Bash.
- **Indicator composition reuse**: Added `IndicatorUtils.requireSameSeries(...)` to centralize same-series validation and refactored `VortexIndicator`, `UltimateOscillatorIndicator`, and `TRIndicator` to compose shared true-range/series-validation logic instead of duplicating private helpers.
- **Indicator validation helper consolidation**: Merged `IndicatorSeriesUtils` into `IndicatorUtils`, added shared
`IndicatorUtils.requireIndicator(...)` / `IndicatorUtils.isInvalid(...)`, and refactored Bill Williams, VWAP,
support/resistance, and Wyckoff indicators to reuse centralized validation and NaN-guard logic.
- **Fractal hierarchy consolidation**: Extracted `AbstractFractalConfirmationIndicator` and
`AbstractRecentFractalSwingIndicator`, and added `FractalDetectionHelper.findLatestConfirmedFractalIndex(...)` so
high/low fractal families share confirmation and scanning logic while preserving the existing public APIs.
- **Fractal documentation and regression hardening**: Expanded Javadocs for shared fractal internals and added
`FractalDetectionHelperTest` coverage for latest-pivot scanning, bounds handling, equality allowances, and invalid
input guards.
- **MACD-V signal-line extensibility**: `VolatilityNormalizedMACDIndicator` now supports custom signal-line indicator injection for both signal and histogram generation.
- **MACDVIndicator API robustness and clarity**: Clarified that `MACDVIndicator` is a volume/ATR-weighted MACD variant (not ATR-normalized MACD-V), added default signal/histogram conveniences and constructor overloads, and hardened warm-up/NaN handling with lazy transient sub-indicator rebuild.
- **MACD-V indicator ergonomics**: `MACDVIndicator` and `VolatilityNormalizedMACDIndicator` now expose configuration/sub-indicator getters, line bundle helpers, momentum-state indicator factories, and crossover/momentum rule helpers for strategy composition.
- **MACD-V package organization**: Grouped MACD-V specific helpers and indicators under `org.ta4j.core.indicators.macd` to reduce top-level indicators package clutter, and retained a deprecated compatibility shim for moved `MACDVIndicator` in `org.ta4j.core.indicators` so downstream projects can migrate imports without immediate build breakage.
- **Deprecation visibility for deprecated classes**: Added runtime deprecation warnings (emitted once per classloader) for deprecated compatibility classes in core and legacy JSON helper classes in examples so migration guidance appears directly in logs.
### Fixed
- **Stop-rule behavior and efficiency**: Trailing stop-gain variants now arm only after the configured favorable move, volatility stop-loss variants trigger on exact threshold touches, gain-side helpers are used consistently, and trailing volatility/fixed-amount rules now reuse stabilized max-lookback indicators to reduce hot-path allocations.
- **NetMomentum neutral pivot validation**: Constructor now rejects `NaN`/infinite neutral pivot values to prevent undefined momentum output states.
- **VolumeIndicator constrained-window correctness**: Rolling sums now anchor to the series `beginIndex` so max-bar-count eviction does not double-count or backtrack into pruned history.
- **Publish-release manual dispatch inputs**: `publish-release.yml` now reads `workflow_dispatch` metadata from event inputs so manual reruns correctly receive `releaseVersion`/`releaseCommit`.
- **Prepare-release metadata guard**: Added a Maven Central metadata validation gate in `prepare-release.yml` (including dry-run mode) to fail early when required POM metadata (including developers) is missing.
- **VWAP and Wyckoff market-structure toolkit**: Added rolling/anchored VWAP analytics (deviation, standard deviation, z-score, bands), support/resistance clustering (bounce-count, price-cluster, KDE volume profile), and Wyckoff cycle analysis APIs with a runnable demo.
- **Release workflow dispatch and metadata checks**: `publish-release.yml` now reads `workflow_dispatch` inputs correctly for manual reruns, and `prepare-release.yml` now fails early when required Maven Central POM metadata is missing.
- **README snippet synchronization line endings**: `ReadmeContentManager.updateReadmeSnippets(...)` now preserves the
target README's dominant line separator (LF/CRLF), with regression tests covering both newline modes.
- **Indicator serialization and stability**: Aligned VWAP, price-cluster, and Wyckoff indicators on descriptor ordering, NaN handling, and unstable-bar conventions.