Comdoll stands for “commodity dollars”. A commodity currency is used to define some currencies that co-move with the world prices of primary commodity products because their countries are closely correlated to the export of certain raw materials for income.
In the Forex Market, Comdoll refers to currencies like the Australian, Canadian, and New Zealand dollars because their respective economies are heavily dependent on exporting commodities. Their currencies represent three of the seven major pairs (AUD/USD, USD/CAD, NZD/USD).