Usage Examples

The ta4j-examples module is the runnable companion to this wiki. Each example is a standalone main program you can open in your IDE or run with Maven.

Start quickly

• Quickstart - Load data, build a strategy, run a backtest, and render the result
• StrategyAnalysis - Print common criteria and strategy diagnostics

Indicators & visualization

• IndicatorsToCsv - Export indicator values for spreadsheet analysis
• IndicatorsToChart - Plot price plus indicator overlays
• CandlestickChart - Candlestick chart overlays
• Charting - Full ChartWorkflow guide

Strategy patterns

• CCICorrectionStrategy - Baseline trend-reversion pattern
• RSI2Strategy - Classic mean-reversion example
• NetMomentumStrategy - Strategy built around Net Momentum
• WalkForward - Full walk-forward optimization loop

Backtesting & analytics

• SimpleMovingAverageBacktest - Baseline crossover backtest
• MovingAverageCrossOverRangeBacktest - Parameter sweeps across SMA windows
• SimpleMovingAverageRangeBacktest - Parameter sweep that ranks the shortlist with weighted normalized criteria (WeightedCriterion.of(...), getTopStrategiesWeighted(...))
• CoinbaseBacktest - Backtest against Coinbase-sourced data
• YahooFinanceBacktest - Backtest against Yahoo Finance data
• TradingRecordParityBacktest - Compare next-open, current-close, and slippage execution models side by side, then show the same fills across default, provided, and factory-configured BaseTradingRecord runs
• TradeFillRecordingExample - Stream fills with TradingRecord.operate(fill), group batches with Trade.fromFills(...), and compare FIFO, LIFO, AVG_COST, and SPECIFIC_ID exit matching
• BacktestPerformanceTuningHarness - Tune large batch runs built on BacktestExecutor
• StrategyExecutionLogging - Trace rule evaluation and execution decisions line by line

If you are learning the current execution stack, start with Quickstart, then TradingRecordParityBacktest, then TradeFillRecordingExample, and finally SimpleMovingAverageRangeBacktest.

Bots & live trading

• TradingBotOnMovingBarSeries - Minimal manual bot loop using a moving series and BaseTradingRecord
• Live Trading - Production-oriented guidance for ConcurrentBarSeries, fill-driven record updates, and recovery
• Bar Series & Bars - Streaming aggregation and bar-ingestion patterns

For new live code:

• Use BaseTradingRecord as the record type
• Update the record from confirmed fills with TradingRecord.operate(fill) or batch one logical order with Trade.fromFills(...)
• Use ConcurrentBarSeries when feed ingestion and strategy evaluation happen on different threads
• Treat LiveTradingRecord and ExecutionFill as compatibility-only APIs during migration

More examples

The examples module also contains data-source adapters, charting helpers, Elliott Wave demos, and indicator showcases. If a workflow is documented in the wiki but missing a runnable example, contributions are welcome.