If we would have gone to 850$ yesterday, everyone would praise the OP as a prophet. But he just made a guess. I should open such a thread, too. I lose nothing but there is slight chance that everyone will praise me...
Of course it was a guess. Are you saying you KNOW what will happen?
And I was wrong btw...but $850 today might happen

It might happen everyday.
But it is hard to guess whoch day is it going to be.