There's no direct way to detect that if you're setting it in a trigger. But this begs the question; what stops you from doing whatever it is you're going to do where you set the tech level? And if that doesn't work, you can store the tech level in a variable, and utilize that. Such as saving it in a real variable, and using "Game - Value Of Real Variable" if everything else fails. It's hard to give a definitive answer with no information about what you're exactly trying to pull off.