Formulas are named and the name is used to order another example for today's news. Look for that element that can't be discussed in advance. The first weather shot was not ordered, it was a non-formula report on something happening. A trend is developing somewhere right now. Sometime in the future it will be a formula and have a name.
News is the biggest formula.
It's a game where journalists write the rule book for each day. An hour before deadline, everything we have becomes news. Mining companies can't redefine iron ore on a slow ore day. Journalists can and do redefine their product every day. Creativity requires a high tolerance for ambiguity.