Controls the styles that are available to points in your chart.
Example:
<styles>
<bar_style name="Style 1">
<states>
<normal>
<fill enabled="true" type="solid" color="DarkBlue" />
</normal>
<hover>
<fill enabled="true" type="solid" color="aqua" />
</hover>
</states>
</bar_style>
</styles>