Trading monopoly

[Shahed]

Greetings All !

I'd like to know the mechanics of how a monopoly is achieved. According to the export_descr_character_traits.txt there is a trigger:

Trigger agents33
WhenToTest CharacterTurnEnd

Condition AgentType = merchant
and TradingMonopoly

Affects Monopolist 1 Chance 100

I assumed monopoly means your trader is the only one trading a resource in a province. However I have a few traders with monopoly (as per the definition I provided) for about 5 years now but they are not monopolists or market controllers i.e they don't have that line.

Is the trigger not working or have I got the monopolist definition wrong ?

EDIT: I'd also appreciate of someone could tell me where I can find a description of "tradingmonopoly" in the game files.

Many thanks !

Salute !