@amcharts/amcharts5/.internal/charts/stock/indicators/WilliamsR.js

amCharts 5

import { OverboughtOversold } from "./OverboughtOversold";
/**
 * An implementation of a [[StockChart]] indicator.
 *
 * @see {@link https://www.amcharts.com/docs/v5/charts/stock/indicators/} for more info
 */
export class WilliamsR extends OverboughtOversold {
    _afterNew() {
        this._themeTags.push("williamsr");
        super._afterNew();
        this._editableSettings.unshift({
            key: "period",
            name: this.root.language.translateAny("Period"),
            type: "number",
            minValue: 3,
            maxValue: 100,
            step: 1
        }, {
            key: "seriesColor",
            name: this.root.language.translateAny("Period"),
            type: "color"
        });
        this._setEditableSettingBounds("overBought", -30, -5, 1);
        this._setEditableSettingBounds("overSold", -95, -70, 1);
    }
    /**
     * @ignore
     */
    prepareData() {
        if (this.series) {
            this.set("field", "close");
            const dataItems = this.get("stockSeries").dataItems;
            let data = this._getDataArray(dataItems);
            let period = this.get("period", 14);
            for (let i = 0, len = data.length; i < len; i++) {
                const dataItem = data[i];
                let h = -Infinity;
                let l = Infinity;
                let b = Math.max(0, i - period + 1);
                for (let j = b; j <= i; j++) {
                    let vh = dataItems[j].get("highValueY");
                    let vl = dataItems[j].get("lowValueY");
                    if (vh == null || vl == null) {
                        continue;
                    }
                    if (vh >= h) {
                        h = vh;
                    }
                    if (vl <= l) {
                        l = vl;
                    }
                }
                if (h !== -Infinity && h - l != 0) {
                    dataItem.valueS = -100 * (h - dataItem.value_y) / (h - l);
                }
            }
            this.series.updateData(data);
        }
    }
}
WilliamsR.className = "WilliamsR";
WilliamsR.classNames = OverboughtOversold.classNames.concat([WilliamsR.className]);
//# sourceMappingURL=WilliamsR.js.map