I would guess that LTC halving effects are already in the current price and I'm not expecting a big rise afterwards.
You are right LTC was $25 at bottom and now is almost 4 times higher. I would rather expect a dump after halving since people will be disappointed.
I think LTC has lost its momentum already and I am not sure if the team are still doing anything to keep the project alive like the other projects are doing, look at Ethereum now, the team of Ethereum is still doing everything possible to keep their project up and running, and they are still coming with an upgrade of 2.0 which will still help to better the system of Ethereum, and probably as agent to an increased value, but for Litecoin, the only thing that I have heard of their project of recent is halving.
Halving is not that enough to really help Litecoin gain the attention of new investors, no one want halving but what Litecoin is able to bring on table to guarantee that their investment with them will continue to yield an increase. If investors cannot get that trust, then there is nothing to that will make the price surge.