How To Compute 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);