Trade publications can be magazines, newspapers, or wire services that are created for the use of people, particularly decision-makers, in a particular industry. American Theatre is one example as is Dance Magazine. Trade publications are excellent sources of material on current trends and forecasts. You can limit to Trade Publications in many databases.
Not all the trade publications you search will be your industry. You may find an article on soft drinks in the trade publications Marketing or Drug Store News. However, somewhere in the results you should see the publications that are read by the people in your industry today.