rxjs-trading-signals/dist/MACD/MACD.js

The user - defined operator helps users quickly output index values. base trading-signals library

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.MACD = void 0;
const big_js_1 = __importDefault(require("big.js"));
const rxjs_1 = require("rxjs");
const MACD = (config) => {
    return (observable) => new rxjs_1.Observable((subscriber) => {
        let { indicator, shortInterval, longInterval } = config;
        const { signalInterval } = config;
        let macd = new big_js_1.default(0);
        if (shortInterval > longInterval) {
            [shortInterval, longInterval] = [longInterval, shortInterval];
        }
        const source$ = observable.pipe((0, rxjs_1.share)());
        const subscription = (0, rxjs_1.zip)(source$.pipe(indicator(shortInterval), (0, rxjs_1.skip)(longInterval - shortInterval)), source$.pipe(indicator(longInterval)))
            .pipe((0, rxjs_1.concatMap)(([short, long]) => {
            const x = new big_js_1.default(short).minus(long);
            macd = x;
            return (0, rxjs_1.of)(x);
        }), indicator(signalInterval, true), (0, rxjs_1.map)(signal => ({
            histogram: macd.minus(signal),
            macd: macd,
            signal: new big_js_1.default(signal),
        })))
            .subscribe({
            next(x) {
                subscriber.next(x);
            },
            error(err) {
                subscriber.error(err);
            },
            complete() {
                subscriber.complete();
            },
        });
        return () => {
            subscription.unsubscribe();
            indicator = null;
            macd = null;
        };
    });
};
exports.MACD = MACD;
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