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Charting Quickstart

Use this page when your goal is simple: render a strategy result quickly and verify signals visually.

For full API coverage, advanced configuration, and styling details, see Charting.

1) Build a base chart

ChartWorkflow chartWorkflow = new ChartWorkflow();
JFreeChart chart = chartWorkflow.builder()
        .withSeries(series)
        .toChart();

2) Add strategy signals

TradingRecord record = new BarSeriesManager(series).run(strategy);

JFreeChart chart = chartWorkflow.builder()
        .withSeries(series)
        .withTradingRecordOverlay(record)
        .toChart();

3) Add indicator overlays

ClosePriceIndicator close = new ClosePriceIndicator(series);
SMAIndicator sma = new SMAIndicator(close, 50);

JFreeChart chart = chartWorkflow.builder()
        .withSeries(series)
        .withIndicatorOverlay(sma)
        .toChart();

4) Handle market-time gaps

Use TimeAxisMode.BAR_INDEX when you want evenly spaced bars (for markets with weekends/holidays):

JFreeChart chart = chartWorkflow.builder()
        .withTimeAxisMode(TimeAxisMode.BAR_INDEX)
        .withSeries(series)
        .toChart();

5) Troubleshoot quickly

  • No chart window: likely headless environment; write chart files instead.
  • Signals look wrong: compare with Backtesting execution assumptions first.
  • Indicator line looks shifted: verify warmup/unstable bars and source indicator wiring.

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