Here is the latest version of the Roles used in the Tradewars - Homeworld BETA... There have been major changes since the Alpha version. Things such as removing the Monarch role and transforming the Trader role, just to name a few. This BETA version of the roles is going to be playtested soon...
Also this version includes the turn-order which is specified for each role. So say your Opponent chooses the Captain role and you choose the Chancellor, because 9 (Chancellor) is higher 6 (Captain), you go first...