Halt may mean good newsUsually when a company that has been doing good, such as our stock, asks for a halt it means that they have good news and they don't want people who may have acquired knowledge of the news to be able to buy the stock before the news becomes public.
After the news has been released, the trading halt is removed. Sometimes not for awhile in order for people to have time to notice the release and evaluate it.
In some cases people can put in a bid at what they think the stock may trade when it opens. People must be anticipating good news because the bid is pretty far above its closing price.