There is no one who can tell you when next correction will be or if the market will go up or down at a certain time. Just invest smart and hope for a great 2018.
Even if we know when that will happen, i am sure that no one will tell you that.. Anyway, it is almost impossible to predict that, otherwise, we all would be millionaires in here and we all could be in a Boat on the middle of Miami with a champagne of $300 in our hands, don't you think so?