Yes they have, plenty of people have studied that and written about it.
My own vulgar explanation is as follows ...
Imagine two men fighting, but they are on a log and can only move forward and backwards. It starts with them standing in front of each other, and one takes off a glove and slaps the other across the face, taking a few steps forward. Shocked, the other takes a few steps back and tries to compose himself, then reacts, takes a few steps forward in anger and starts being aggressive. Surprised by the response, the original aggressor walks backwards on guard, waiting for the one who was slapped to calm, to allow his anger to subside, while being sure he doesn't get killed while waiting. Once the energy is somewhat spent, he again takes advantage and pushes forward .. maybe he lands some harsh blow, seriously injuring, and at this point the crowd tries to bolster one party or the other, etc. If you were to roll the log slowly over a long piece of paper and draw a mark every few moments where the parties stood on the long, it would create a chart in time, up and down movements, it would literally become a historical record of how the event played out over time, you could see in time where people had moved forward and backward, it would essentially be a record of emotions, of anger and surprise, of fear, of the crowd's cheers, etc.
Market charts are no different, they are in waves up and down because of emotions like fear and greed, they are charts of parties of traders pushing forward, relaxing, pushing back, etc. There are times when charts move towards certain points, such as towards trend lines, because the people who want to buy see that a trendline is below and start to believe that sellers intend to go there, so they lose faith in their collective ability to buy the price up, and for a time stop buying, or even sell themselves, because they believe they will get the instrument at a cheaper price when it hits the trend line. Conversely, the sellers see the same point, and are emboldened, and sell and refuse to cover until the point is reached, believing their side has the advantage. Upon reaching the point, emotions change, the sellers' greed turns to fear, they start to believe that the buyers will overwhelm them, that there is no more room to sell, and the buyers who had been waiting patiently to buy are suddenly emboldened and jump in with buy orders and the trade moves in a different direction.
And so it goes, sometimes one side or the other is stronger, sometimes greed or fear is in charge, and sometimes it isn't obvious and the charts just meander along and the traders take control, trading it up, then down, up and down, choppy, with no particular destination except that what was going up goes down, and what was going down goes up, with no real animal spirits in control.
Charts may also have more rational elements such as seasonal changes, or reactions to fundamental data, or momentary blips based on expiration, or dividend payments, etc. But in any case, it IS studied, and there are reasons (even if irrational) that things happen, and there are people who claim to have understood these things and have written books on the subject.