1 what define leading indicators?

The leading indicators are those economic series that change direction in advance of the business cycle.

The English term 'indicator' has a few senses: 1: (chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical...

A measurable economic factor that changes before the economy starts to follow a particular pattern or trend. Leading indicators are used to predict changes in the economy, but are not always accurate.

There are a number of them (no exact number). For example, rates of obesity is a leading health indicator. Rates of diabetes, hypertension, heart attacks and strokes are also used, and many others,...

more that a billion or 1,000,000,000,000