Litecoin had a lot of good news + Charlie lee had an interview on TV, all of this happened within a week, I think that's the reason it went up so fast.
You're asking if litecoin will go back to "normal range", probably not. There's a lot of theories from people saying that litecoin in theory should be worth .25 of what bitcoin is worth.

I think 2018 will be a good year for LTC.