Probably because they have both standard names and nonstandard - for example for normally quoted pairs and pairs with extra digit at the end. Or for pairs that can be traded in micro-lots and that can't be traded and so on. Of course, standard named pairs may be deactivated, so you see only the ones with non-standard names.
Probably because they have both standard names and nonstandard - for example for normally quoted pairs and pairs with extra digit at the end. Or for pairs that can be traded in micro-lots and that can't be traded and so on. Of course, standard named pairs may be deactivated, so you see only the ones with non-standard names.
