### Trend Lines

Important! This feature requires the wijmo.chart.analytics extension module.

Trend lines are used to represent trends in data and to examine the problems of prediction.

The following example indicates moving average trend based on the past prices. User can change the period and type of the moving average line.

1. period: the calculation period of the moving average line.
2. type: the calculation type of the moving average line. This includes Simple, Weighted, Exponential and Triangular types.

- Period:
- Type: Simple Weighted Exponential Triangular