If we all know the answer to this question with certainty, I am very sure everyone would have been so wealthy by now that you won't be bother about working as it will only take you the keypads of your phone or laptop and access to the internet to flip wealth and make tons of money because you know what will happen next unfortunately we don't.

The interesting thing about trading and what makes it interesting is that unknown factor because, take that away from the market, it becomes boring and lose its savor. If anybody thinks he can decide or know based on historical analysis, its just a guess which could either come out right or the other way round. No more, no less