I've always had my trade deadlines 3 wks before the playoffs start. So, with 14 regular season games, the deadline would be the start of week 11 games. If the league is competitive, then most everyone should still have a shot at the playoffs at this point. If a team has a shot at making the playoffs, they are less likely to trade their good players to help another team.
Fantasy Football Junkies Anonymous meetings held weekly on Sundays... and Mondays... and sometimes Thursdays.