Visual Structure
This article will help you understand the main concepts used in the scope of the RadSparkline controls.

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Marker/Data Point Visual: A visual element presenting the associated data item from the ItemsSource of the RadLinearSparkline, RadAreaSparkline and RadScatterSparkline controls.
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Column/Bar: A visual element presenting the associated data item from the ItemsSource of the RadColumnSparkline and RadWinLossSparkline controls.
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Line: The line formed by the data items in the ItemsSource of the RadLinearSparkline and RadAreaSparkline controls.
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Area: The area formed by the data items in the ItemsSource of the RadAreaSparkline control.
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Axis: A horizontal axis that marks a point on the vertical (Y) axis.
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First Point Indicator: A marker displayed for the first data item.
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Last Point Indicator: A marker displayed for the last data item.
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High Point Indicator: A marker displayed for the data item with the biggest value on the vertical (Y) axis.
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Low Point Indicator: A marker displayed for the data item with the lowest value on the vertical (Y) axis.
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Negative Point Indicator: Markers displayed for the data items with negative values on the vertical (Y) axis.
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Normal Range: A rectangular area between two points on the vertical (Y) axis that annotates a range on the axis.