I have still not solved this. Attached is a screenshot that shows my currencies. I do not know where the line with ":" came from but I can't get rid of it because it says it is in use. When currencies are updated the response is "null" and GBP to GBP = 1. What do I enter and where to get EUR to GBP and vice versa with Alphavantage?
Where by accident I know not but one of my unlisted securitie that I update myself changed its currency from GBP to EURO. It will not let me change it back. It seems to when I change the tick box but does not save the changes. How do I resolve this?