Greece elections: What to expect?

Sunday is a really important day for Greece.... and for EU.
This election will predict Europe's future, not only greek's future and actually I don't know what we could expect about it.
The markets are worried about it, for sure. Merkel is worried as well, maybe more than markets.
But... is it a real democratic election? I'm not referring about the procedures, but about people's choice, people's vote.
It's a democratic elections, but maybe the result is a consequence of fear, fear of what can happen after sunday... Happened the same with Ireland in the last referendum.

My question is: Do markets vote? Is it a market's democracy?