@sunrise1002/tats/lib/moving_averages/WilderSmoothing.js

Techincal Indicators written in javascript

import { Indicator } from '../indicator/indicator';
import { LinkedList } from '../Utils/LinkedList';
//STEP3. Add class based syntax with export
export class WilderSmoothing extends Indicator {
    constructor(input) {
        super(input);
        this.period = input.period;
        this.price = input.values;
        var genFn = (function* (period) {
            var list = new LinkedList();
            var sum = 0;
            var counter = 1;
            var current = yield;
            var result = 0;
            while (true) {
                if (counter < period) {
                    counter++;
                    sum = sum + current;
                    result = undefined;
                }
                else if (counter == period) {
                    counter++;
                    sum = sum + current;
                    result = sum;
                }
                else {
                    result = result - (result / period) + current;
                }
                current = yield result;
            }
        });
        this.generator = genFn(this.period);
        this.generator.next();
        this.result = [];
        this.price.forEach((tick) => {
            var result = this.generator.next(tick);
            if (result.value != undefined) {
                this.result.push(this.format(result.value));
            }
        });
    }
    nextValue(price) {
        var result = this.generator.next(price).value;
        if (result != undefined)
            return this.format(result);
    }
    ;
}
WilderSmoothing.calculate = wildersmoothing;
export function wildersmoothing(input) {
    Indicator.reverseInputs(input);
    var result = new WilderSmoothing(input).result;
    if (input.reversedInput) {
        result.reverse();
    }
    Indicator.reverseInputs(input);
    return result;
}
;
//STEP 6. Run the tests