# 6.3.7 Trend Chart

**Introduction**

Trend graph shows the data as a dynamic curve, X axis represent the time span, Y axis represent the data.

**Description**

![](https://3950998874-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Fpi-series-user-manual%2F-LuqB9LT_gvwMaqXcWhj%2F-LuqEACyE87ANVV4Cxx1%2F50.png?generation=1575015464052718\&alt=media)

**1) Source**

**Curve buffer:** Select data from \[[Trend Chart](https://wecon.gitbook.io/pistudio-manual/8.-basic-functions/8.6-trend-chart)], and display data in term of curve;

**Curve displays:** HMI will display curves according to select \[Trend Chart], and user could select which curves need to be displayed and select \[Line type] and \[Color] for each curve;

**2) Range**

![](https://3950998874-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Fpi-series-user-manual%2F-LuqB9LT_gvwMaqXcWhj%2F-LuqEACzrqE11IAuy2Bq%2F51.png?generation=1575015464067302\&alt=media)

Set data range limit of curve (max and min). Also, could set variable to control data range;

**Result**

When all configurations are completed, when the HMI is running, it displays as shown below.

![](https://3950998874-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Fpi-series-user-manual%2F-LuqB9LT_gvwMaqXcWhj%2F-LuqEAD-bTKlGAPjD4o8%2F52.png?generation=1575015464117041\&alt=media)

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