Is there a 100% certain direction in the market?

No.
Since there is none, what is our basis for entering the market?
This varies for each person's operational preferences.
Take me as an example, the basis for entering the market is whether it doesn't matter whether the direction is long or short, but whether I can come back in a short period of time and how high the probability of coming back is. As long as the probability is sufficient, just do it.