Post only

1. Post-only.
It is a function that prevents the sale from being carried out at the market price when sold at a limit price.

If the price is concluded at the market price when trading at a limit price, automatic cancellation will be made.

The reason why I use this function is to make sure that when I try to buy at a limit price, it suddenly goes down or up more than I thought, so that it won't be purchased when the benchmark is lowered.