rxjs-trading-signals/dist/TR/TR.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.TR = void 0;
const big_js_1 = __importDefault(require("big.js"));
const rxjs_1 = require("rxjs");
const TR = () => {
    return (observable) => new rxjs_1.Observable((subscriber) => {
        let prevCandle = null;
        const subscription = observable
            .pipe((0, rxjs_1.concatMap)(candle => {
            const high = new big_js_1.default(candle.high);
            const highLow = high.minus(candle.low);
            if (!prevCandle) {
                prevCandle = candle;
                return (0, rxjs_1.of)(highLow);
            }
            const highClose = high.minus(prevCandle.close).abs();
            const lowClose = new big_js_1.default(candle.low).minus(prevCandle.close).abs();
            prevCandle = candle;
            return (0, rxjs_1.from)([highLow, highClose, lowClose]).pipe((0, rxjs_1.max)((a, b) => (new big_js_1.default(a).lt(b) ? -1 : 1)));
        }))
            .subscribe({
            next(x) {
                subscriber.next(x);
            },
            error(err) {
                subscriber.error(err);
            },
            complete() {
                subscriber.complete();
            },
        });
        return () => {
            subscription.unsubscribe();
            prevCandle = null;
        };
    });
};
exports.TR = TR;
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