@thuantan2060/technicalindicators/lib/Utils/AverageGain.js

Techincal Indicators written in javascript

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.AvgGainInput = exports.AverageGain = void 0;
exports.averagegain = averagegain;
var _indicator = require("../indicator/indicator");
class AvgGainInput extends _indicator.IndicatorInput {
  period;
  values;
}
exports.AvgGainInput = AvgGainInput;
class AverageGain extends _indicator.Indicator {
  generator;
  constructor(input) {
    super(input);
    let values = input.values;
    let period = input.period;
    let format = this.format;
    this.generator = function* (period) {
      var currentValue = yield;
      var counter = 1;
      var gainSum = 0;
      var avgGain;
      var gain;
      var lastValue = currentValue;
      currentValue = yield;
      while (true) {
        gain = currentValue - lastValue;
        gain = gain > 0 ? gain : 0;
        if (gain > 0) {
          gainSum = gainSum + gain;
        }
        if (counter < period) {
          counter++;
        } else if (avgGain === undefined) {
          avgGain = gainSum / period;
        } else {
          avgGain = (avgGain * (period - 1) + gain) / period;
        }
        lastValue = currentValue;
        avgGain = avgGain !== undefined ? format(avgGain) : undefined;
        currentValue = yield avgGain;
      }
    }(period);
    this.generator.next();
    this.result = [];
    values.forEach(tick => {
      var result = this.generator.next(tick);
      if (result.value !== undefined) {
        this.result.push(result.value);
      }
    });
  }
  static calculate = averagegain;
  nextValue(price) {
    return this.generator.next(price).value;
  }
}
exports.AverageGain = AverageGain;
function averagegain(input) {
  _indicator.Indicator.reverseInputs(input);
  var result = new AverageGain(input).result;
  if (input.reversedInput) {
    result.reverse();
  }
  _indicator.Indicator.reverseInputs(input);
  return result;
}
;
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