It depends how you define random. To me random is something that changes form in a vacuum, there is no force acting on it but still moves in an entierly abritrary fashion. Price, on the other hand, does move for a reason. It relates to economic forces pushing it. I dont mean to sound condecending but so many "traders" think all there is to trading is staring at a chart with squiggly lines and they watch the price for some "random" reason moving towards their squggly line so they sell it (because its at a squggly line so must stop there...) then the price carries on through and they scream and shout "some times it goes through sometimes it doesnt how can i make money in this, its random!!"
But if you start to learn about why markets exist and what effects them it starts to make more sense. There is so much money changing hands everyday that isnt even that bothered about price they are interested in exposure, risk, yield etc. If the US hike rates and japan dont you have people that have huge exposure in Yen that is earning them no interest so by transfering the money into dollars they instantly get 4%+ more interest on your money. This is what the markets are really there for. And thats why the price went through your squiggly line coz you were trading the dollar against the Yen. And not every person changes their currency over in a split second they do it continuously as their business's trade they are constantly changing their currency exposure, hence trends.
However, the "random" element is you dont know when these economic changes are going to happen i.e nobody can tell you what interest rates/oil inventories/GDP will be 2 years from today, but its amazing how much more logical the markets are when you understand why they are moving now, and you know they are likely to continue moving that way until another force stops it. As i said before we are not in a random vacuum