To qualify for real-time price information on US stock markets, we need to request additional information about your investing and professional activities. This data is shared with the NYSE and NASDAQ stock exchanges to enable them to provide a full service. 

If you indicate that you wish to do so, as a non-professional investor you will receive real-time price information free of charge as long as you are actively investing. If you do not invest in a personal capacity or are not an active investor, you will still receive delayed price information. 

It is therefore important to keep the data you have provided up-to-date in your settings.