However, this experiment specifically uses Post Only Limit Orders, which are designed not to execute immediately but to sit in the order book as liquidity at the specified price.
They don't exist inside the orderbooks though which means they don't affect anything because for them to have any effects on the market participants, they have to be seen. Like this example from
wall observer topic.
We can see all these orders, their size and prices. And that can affect the market. For example in here, we can see more sell orders than buy orders which means going up is harder than going down, to put simply...
Theoretically when there is a massive sell (or buy) wall, that wall can prevent rises (or drops) past that wall price. Specially if that wall is bigger than daily volume which is easier to see in the altcoin market. Such a wall will force other traders who want their orders filled to place their own orders below (or above) that price therefore bringing the price down (or up).
This is market manipulation by the way and it is nothing new. We've had that in the market for a long time. The only thing new in your idea is to make it into a "pair" and place them as Post Only Limit Orders.