Macbook
52 lines
1.6 KiB
Java
52 lines
1.6 KiB
Java
package com.goldenchart.service;
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import com.goldenchart.dto.TrendLineConfig;
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import com.goldenchart.dto.TrendLineKind;
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import org.ta4j.core.BarSeries;
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import org.ta4j.core.Indicator;
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import org.ta4j.core.indicators.AbstractIndicator;
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import org.ta4j.core.num.Num;
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import static org.ta4j.core.num.NaN.NaN;
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/** bar index 에서 N봉 추세선 Y값 — left 지표·종가와 CROSS 비교용 */
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public class TrendLineValueIndicator extends AbstractIndicator<Num> {
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private final Indicator<Num> source;
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private final BarSeries series;
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private final int lookback;
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private final TrendLineConfig config;
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private final TrendLineKind kind;
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private final boolean priceScale;
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public TrendLineValueIndicator(
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Indicator<Num> source,
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BarSeries series,
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int lookback,
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TrendLineConfig config,
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TrendLineKind kind,
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boolean priceScale) {
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super(series);
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this.source = source;
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this.series = series;
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this.lookback = Math.max(2, lookback);
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this.config = config != null ? config : TrendLineConfig.defaults();
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this.kind = kind != null ? kind : TrendLineKind.DOWN;
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this.priceScale = priceScale;
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}
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@Override
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public Num getValue(int index) {
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double v = TrendLineMath.valueAt(series, source, index, lookback, config, kind, priceScale);
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if (!Double.isFinite(v)) {
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return NaN;
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}
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return series.numFactory().numOf(v);
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}
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@Override
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public int getCountOfUnstableBars() {
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return lookback + 1;
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}
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}
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