Actually,,, the exchanges I have do not let you do it. When you already put the one buy order at the price, and you try to put another sell order at the same price, I remember getting a message saying you are not allowed to do it. Cannot remember which exchange this was but I assumed it was then for all.
Thanks! I think this behaviour actually makes the most sense. Preventing a user from selling lower than their highest buy (or vice versa)
before their order is placed on the market seems to be correct.
I cannot remember the term for it but on regulated exchanges the practice is forbidden,,, for normal stock exchange and for foreign exchange markets is what it does not allow because it is just against the regulations. Maybe now for many unregulated crypto platforms they allow it but sooner or later the practice will be banned so people can only do it on DEXes I guess:)