Hypothetical then.
You can vote for whoever you want. But you will get one of the two.
Voting for someone else is basically the same as not voting. Sure you make a point, but the result will be the same.
Like I said, if there is nothing else you care about, vote for Pedro or whatever.
If 10% voted for some third party that would make the headlinds.
And be drowned in the rest of the election news and one of the two would win anyway.