I might will need a while to digest this info, so let's move from this topic a while until I have some time to spare to read your explanation slowly.

Meanwhile, another question, what would happen if, lets say a token is rather a junk token, abandoned by dev, stuck only on one exchange, with only sell order with no buy orders. In short, take a look at wavesdex, they have plenty of weird tokens. Let's say someone wanted to swap token with these characteristics to btc or eth, what will happen then? Does the swap even possible?