Trigger activation condition level of discrimination

[Spikeball]

I know the when the condition for a trigger is met you can't not have the power activate but how discriminatory can a trigger be?

Can you have a condition like "when an enemy gets within 6 meters" or "when a non-ally touches me"? Do those work or do you need a separate advantage/limitation to add such a discrimination like how Area of Effect has selective?

[Steve Long]

That's entirely up to the GM. Some GMs are pretty forgiving about this, others are tough. Some may require you to justify your definitions. For example, in my campaign, I'd want a "reasonable" (within genre conventions and definitions ) explanation of how your Trigger could determine who's an enemy/ally and who's not. But personally, I wouldn't consider either of your example Triggers as being invalid per se.