how would i buy and sell to make profit looking at a LTC/BTC chart?
do i just have to wait until the price gets high enough for me to sell my LTC?
Simple Answer: To get profit, just buy low and sell high.
But there is no 100% successful strategy, and it is not easy to really predict the short-term price movement in future.
You can find a lot of info and different kind of predictions / strategies here.
https://bitcointalk.org/index.php?board=57.0