I depends on who you are looking to trade away. Looking at your roster, I don't see any clear trade candidates. Guys that are hitting well, but expendable. Maybe Rizzo because you already have Goldy, but he wouldn't make sense to get rid of if you need power. I think he's due for a nice power run.
If it's not a keeper and you can get anything at all for him, I definitely move Machado. I like him as a real player and love his future, but I don't think he has much value in a yearly league. You just need more power from a 3B. If there's somebody buying into the hype, I'd see what you could get. I'd imagine that markets shriveling up. The HR power hasn't been there all season, and now he's not hitting at all.
It seems like the wire might be your best bet. Unless you plan on trading Cutch for a more pure bopper, I dont' see a ton of guys that make sense to move if you need power. Trading a guy like Andrus or Aoki probably won't get you much better than a waiver type of bat anyway.
10 team 5x5 ROTO (OBP), 11-player keeper, C/1B/2B/3B/SS/MI/CI/IF/5OF/UTIL/8SP/3RP
C: Lucroy, Gattis
1B: Rizzo, Trumbo, Frazier, Lind
2B: Kinsler, Kipnis
3B: M.Cabrera,Machado, Arenado
SS: EverCab, Franklin, Dozier, B.Miller
OF: Stanton, Holliday, Choo, Crawford, Marte, Blanks, Moss, Ibanez
SP: Gio, Scherzer, Peavy, Minor, Fister,Teheran, Cashner, Kluber, Gee
RP: Romo, Veras, Mujica, Gregg