Sorrry, but you have create any symbol in the text file for Yahoo.
To update the data live delete the csv file and then you can upload the new data in Yloader.
The usa indexes are live with none retard and I think also the usa stocks,but the European data have a retard of 15 minutes.
Here are my text data:
https://workupload.com/file/AnQnX2HfRud