As many analysts are expecting a major rally in Alts Market once BTC price stabilizes and BTC dominance Index comes down to 60% then we might see Lite coin breaking its ATH record of $375.
So you're think if BTC dominance come down (The price decreased/got dump) then Lite coin price will in bullish and breaking new ATH?
That's contradicting on your statement with the graph (actual) happened.

As you can see if Bitcoin in bullish, Litecoin will following too. And if Bitcoin got dump, Litecoin also same. So this means, Litecoin will always following Bitcoin.
Litecoin is not like Ethereum when bitcoin dominance come down 37,84%, Ethereum rise up to 31,17%.