I've looked in the game FAQ. I bought some chronos motion trails for both hands. Activated them both in my inventory. But still havn't got them, and I bought them yesterday. Any help?

chronos trails are hard to see ingame because of the white background.
try using a mod with some big blue objects or something that should make it easier to see... if still u cannot see them, i have no idea whats going on.

No, it still won't show. D:

Some servers and some mods won't show trails. Try a different server, with a more normal mod.