How to wiggle in After effects?
https://forums.creativecow.net/thread/227/6151 (how to wiggle on 1 axis only)
Type wiggle(2,50). This expression states that twice a second the text should wiggle 50 pixels on the x & y axis – the first number is how many times a second, the 2nd is the amount of pixel movement.
more info:
http://www.premiumbeat.com/blog/after-effects-wiggle-expression/