How To Compute Stochastic Oscillator in JavaScript?

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by ethelyn , in category: General Help , 2 months ago

How To Compute Stochastic Oscillator in JavaScript?

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1 answer

by bobbie.kris , 2 months ago

@ethelyn 

To compute the Stochastic Oscillator in JavaScript, you can follow these steps:

  1. Define the parameters: You need to define the period length and the closing prices for which you want to calculate the Stochastic Oscillator.
  2. Calculate the %K value: To calculate the %K value, you need to first calculate the highest high and lowest low over the specified period. Then, you can use the formula: %K = (current closing price - lowest low) / (highest high - lowest low) * 100.
  3. Calculate the %D value: Once you have the %K value, you can calculate the %D value by taking the moving average of the %K values over a specified period.


Here is a sample code snippet to compute the Stochastic Oscillator in JavaScript:

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function calculateStochasticOscillator(period, closes) {
  let highestHigh = Math.max(...closes.slice(0, period));
  let lowestLow = Math.min(...closes.slice(0, period));

  let currentClosingPrice = closes[closes.length - 1];
  let percentK = ((currentClosingPrice - lowestLow) / (highestHigh - lowestLow)) * 100;

  // Calculate %D value using a moving average over a specified period
  let percentD = calculateMovingAverage(percentK, period);

  return { percentK, percentD };
}

function calculateMovingAverage(values, period) {
  let sum = 0;
  for (let i = 0; i < period; i++) {
    sum += values[i];
  }
  return sum / period;
}

// Example usage
let closes = [23.45, 24.56, 25.67, 26.78, 27.89, 28.90, 30.01, 31.12, 32.23, 33.34];
let period = 5;
let stochasticOscillator = calculateStochasticOscillator(period, closes);

console.log(stochasticOscillator);


This code snippet calculates the Stochastic Oscillator values for a given set of closing prices and a specified period length. You can adjust the period length as needed for your analysis.