The Houston Rockets made a lot of major moves this summer. If you want them to make more, you'll have to wait: They have 7 players who can't be traded until December 15th.
That's almost half the active roster. Granted, that leaves plenty of guys who can be traded. Unless you've got Houston moving one of the "core five" or Kevin Durant, that's a moot point.
Those guys are untouchable. The Rockets are unlikely to move any of those guys at all this year, but even if they ship off one of the youngsters, they'll give them half a season.