> If that is the case, what are the list of symbols that are not to be used in ad campaigns? It's difficult to fully enumerate this because it's highly context

> If that is the case, what are the list of symbols that are not to be used in ad campaigns? It's difficult to fully enumerate this because it's highly contextual. If the text was talking about the stock market, we'd all be assuming the down-red arrow to mean something entirely different.