rxjs-trading-signals/dist/DEMA/DEMA.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.DEMA = void 0;
const big_js_1 = __importDefault(require("big.js"));
const rxjs_1 = require("rxjs");
const EMA_1 = require("../EMA/EMA");
const DEMA = (interval, isOutput = false) => {
    return (observable) => new rxjs_1.Observable((subscriber) => {
        let innerResult = new big_js_1.default(0);
        const subscription = observable
            .pipe((0, EMA_1.EMA)(interval, true), (0, rxjs_1.tap)(x => (innerResult = x)), (0, EMA_1.EMA)(interval, isOutput), (0, rxjs_1.concatMap)(outerResult => {
            return (0, rxjs_1.of)(new big_js_1.default(innerResult).times(2).minus(outerResult));
        }))
            .subscribe({
            next(x) {
                subscriber.next(x);
            },
            error(err) {
                subscriber.error(err);
            },
            complete() {
                subscriber.complete();
            },
        });
        return () => {
            subscription.unsubscribe();
            innerResult = null;
        };
    });
};
exports.DEMA = DEMA;
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