Every week you delay is a week your competitors may be moving from observation to action while you're still debating what the chart means.

Excel's basic formulas work fine for simple calculations, but they quickly become cumbersome when you're dealing with complex data analysis. You end up with nested functions that are hard to read, ...

When I first discovered Excel's dynamic array functions, my entire approach to spreadsheet design shifted. They replaced my clunky, multistep workarounds with smart, self-expanding formulas that adapt ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...