Fetch the price (EU format) of an asset from Yahoo Finance and saved to Google Sheet

yahoofinance.gs

/**
 * Fetches the price of a financial instrument from Yahoo Finance.
 *
 * @param {string} ticker The symbol/ticker of the financial instrument (e.g. "BTC-EUR" or "VWCE.MI").
 * @return {string} The price of the financial instrument.
 * @customfunction
 */
function YAHOOFINANCE(ticker) {
  const url = `https://finance.yahoo.com/quote/${ticker}?p=${ticker}`;
  const res = UrlFetchApp.fetch(url, { muteHttpExceptions: true });
  const contentText = res.getContentText();
  const priceMatch = contentText.match(/<fin-streamer(?:.*?)active="">(\d+[,]?[\d\.]+?)<\/fin-streamer>/);

  if (priceMatch && priceMatch[1]) {
    const rawPrice = priceMatch[1];
    const priceWithPoint = rawPrice.replace(',', '.');
    const lastIndex = priceWithPoint.lastIndexOf('.');
    const price = priceWithPoint.substring(0, lastIndex) + ',' + priceWithPoint.substring(lastIndex + 1);
    return price;
  } else return "Price not found"; 
}

function refreshPrice() {
  var spreadsheet = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = spreadsheet.getSheetByName("Investments"); 
  
  var cells = [
    sheet.getRange("W3"),
    sheet.getRange("W4"),
    sheet.getRange("W5")
  ];

  var originalFormulas = cells.map(function(cell) {
    return cell.getFormula();
  });

  cells.forEach(function(cell) {
    cell.setFormula("");
  });
  
  SpreadsheetApp.flush();
  Utilities.sleep(1000);

  cells.forEach(function(cell, index) {
    cell.setFormula(originalFormulas[index]);
  });
}

function createTrigger() {
  ScriptApp.newTrigger("refreshPrice")
    .timeBased()
    .everyMinutes(1) 
    .create();
}