* Sell ltc, then automatically buy back up at a slightly lower price, and just keep repeating this.
I am not sure if this is what you need, since I've only made one of the translations for
a website, didn't actually use the bot, but you could take a look there, since there are reviews and real use too. (On bottom-left of the website you'll find it available in multiple languages).
3Commas has DCA strategy and you can choose the base currency too. Give it a read, give it a try for free and then you'll see if it's what you need.
Again, it may or may not be 100% what you need, but it may worth a look.
* Increase ltc holdings
On a second thought, you may not even need DCA and any strategy would work as long as you can select the base coin.
I'd start with
reading and free bots and small amounts. And keep in mind that trading has its own risks. Good luck.