Required Main Stats
By default, main stats on artifacts are not checked (see notes section below regarding Unwanted Flat Stats).
For artifact types that display this option (Figure 1), selecting any of the main stats listed will sell any artifacts of that type that do not have any of the selected main stats (see Example section below). If you are not farming for a specific main stat, you should not enable any of these options.
If any Unwanted Flat Stats options are set, they will be checked even if no Required Main Stats are chosen.
Selecting the Accuracy main stat for Chestplates will sell any Chestplates that do not have the Accuracy main stat. Selecting Attack % and Accuracy will sell any Chestplates that do not have either stat as the main stat.