react-financial-charts/lib/indicator/rsi.js

React charts specific to finance.

import { merge, rebind } from "../utils";
import { rsi } from "../calculator";
import baseIndicator from "./baseIndicator";
const ALGORITHM_TYPE = "RSI";
export default function () {
    const base = baseIndicator()
        .type(ALGORITHM_TYPE)
        .accessor((d) => d.rsi);
    const underlyingAlgorithm = rsi();
    const mergedAlgorithm = merge()
        .algorithm(underlyingAlgorithm)
        .merge((datum, i) => { datum.rsi = i; });
    const indicator = (data, options = { merge: true }) => {
        if (options.merge) {
            if (!base.accessor()) {
                throw new Error(`Set an accessor to ${ALGORITHM_TYPE} before calculating`);
            }
            return mergedAlgorithm(data);
        }
        return underlyingAlgorithm(data);
    };
    rebind(indicator, base, "id", "accessor", "stroke", "fill", "echo", "type");
    rebind(indicator, underlyingAlgorithm, "options", "undefinedLength");
    rebind(indicator, mergedAlgorithm, "merge", "skipUndefined");
    return indicator;
}
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