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I voted two days ago.
I will vote later today.

I'm not sure how often you can vote, but I check now and then.

Yes, I check it now and then too.
And I vote after checking the current price.

Do I have to signup for upvoting? help

I don't think you have to be logged in to vote, but doing so lets you create a portfolio of coins you want to watch.

Ok thank you for the information.