The market is made of transactions. For a transaction to happen, there needs to be at least one seller and one buyer.
The problem is : there are not always exactly the same number of sellers for the same number of buyers. That’s why price has to move.
If there are not enough sellers to match all the buyers orders, i.e. more people are buying than selling, price has to rise in order for enough sellers to be willing to enter the market and sell so that all the transactions can be cleared. The same happens when there are many people selling, but not many are buying. Those excess sellers need a buying counterpart, so price has to fall in order for the asset to look cheap enough for people to be willing to buy and everybody to be happy.
The constant search for a perfect equilibrium between buyers and sellers is also called supply and demand. Supply and demand is what makes prices move. Behind supply and demand are real people. People are the market. Without people there is no market.
So if no one buys, and no one sells, price goes NOWHERE. It’s not the economies of the globe that move the market, it’s supply and demand. Economies of the globe can be a motivation behind the buying and selling, but NOT necessarily. If an economy is doing bad, but for whatever reason people want to buy that economy, than price is rising. Simple as that.
Hope this helps!