The formula bar is used in PowerMetrics when creating and editing data feeds for custom metric building. In the formula bar you build formulas, using functions, to manipulate, refine, and perform calculations on your data. See How to use the formula bar for more detailed information.
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How do I build formulas?
To build a formula, add a new column in the data feed editor, then click on Insert or start typing in the formula bar.
Tip: If you click Insert > Function and select an item from the list, information about the function displays and the function is automatically inserted into the formula bar.
How do I view all functions?
To see all functions, click Insert > Function, then click on the Browse All Functions link. The Function Browser opens in the right-hand sidebar.

Where can I learn more about functions?
When you select a function, a Help pop-up displays with a description, examples, and parameter information. You can dismiss this pop-up feature by clicking the X in the dialog and reactivate it at any time by toggling the Hide Function Help to Show Function Help.
You can also find information for all functions in this Knowledge Base article.