Each has its own probability?

Well, when approaching important levels, the camp is divided — someone starts to shorts hard, as the market has already come a long way up and the probabilities, in their opinion, shift towards the shorts. Someone, like rezvyakovtsy, will buy, since the likelihood of the trend continuation, in their opinion, always more than the other way around. All in all, each has its own probability, what is alarming. In my opinion, the probability is always the same.
And what, if it doesn't go up or down, but chatting back and forth in a narrow range, bumping feet and at one camp and at another, which in my opinion is most likely, since no one described such a scenario — everything is either up, either down, and the minority always wins.