How does a wrestler recognizes weaknesses in his opponent?

I'm a high school wrestler and i'll admit that my technique is not as good as it should be, but my athleticism is superior... as well as my ability to understand strategy. what my question is, what are some signs of weakness in an opponents technique? what can you do to take advantage of these weaknesses? or what about strategies? like changing up your lead leg, or how about: is being able to shoot a single/high crotch on each leg advantageous?