Unable to get private key for Blockchain wallet I am new to BTC and I have a question: How to get private key from Blockchain wallet for a "Watch only" address? I have been trying for days with no positive results. Thanks.
You have to have that private key already. You cannot derive it from the public address. A watch-only address is an imported address.

If you've imported it from a paper wallet, check for the private key that should be printed on the same paper. You can scan the private key and upgrade the watch-only address to one that you can spend from as well.

If you imported some address you do not have the private key of, it will remain a watch-only address for you forever.