Last updated: 24th of June, 2017 (post-chain rework #2)
If you haven't used this before, start by selecting the units you own (click them on the top), then mark units whose chains you've completed by clicking on them in the completable section. For older players it will be more convenient to use the Select All button and then deselect unowned units.
Currently, this section of the site is completely separate from the user character management section for registered users. No data from your account is used for it and no data from here is used in the user character management section.
Keep in mind that some units are currently unobtainable or are only periodically available (bosses, Furion, etc.)
The units which you check (toggle) will be saved with localStorage, those units will be automatically checked when revisiting the site with the same browser on the same device
If a unit is marked as completed and then one of its chain dependancies is unchecked (unowned), the 'completed' unit will reset and be moved to incompletable section.