the least you will accept. a curve this thin moves between the quote and the block, and this is the number that decides whether the trade reverts or fills badly.
anything not on this list can be pasted as an address. it is checked against the chain before it is offered.
priced by running every route end to end against this block and keeping whichever actually paid the most, not by a formula. looking costs nothing. the button only wakes up after the exact transaction has been simulated and came back clean.