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  28  <H3><A NAME="8_6_1">8.6.1  Stock Charts</A></H3>
  29  <P> Stock charts is used to display data values where one is interested
  30   in 4 different values for each data point. This could for example be
  31   used to display a stocks open,close, min and max value during a
  32   specific day. Hence the name Stock chart (or Stock plot).</P>
  33  <P> The figure below illustrates a sample Stock chart plot<DIV class="example">
  34  <BR> <A href="exframes/frame_stockex1.html" target="blank"><IMG border="0"
  35  HEIGHT="200"  src="img/stockex1.png" WIDTH="300"></A>
  36  <BR><B>Figure 64:</B> A simple stock plot <A href="exframes/frame_stockex1.html"
  37  target="blank">[src]</A>&nbsp;
  38  <P></P>
  39  </DIV></P>
  40  <P> For this type of plot the Y-data array must be consist of a number
  41   of quadruples of data where each quadruple consists of
  42   (open,close,min,max). The open and close values determine the min max
  43   for the middle bar and the min,max determine the end points of the
  44   &quot;error-lines&quot; at the top and bottom of of each bar.</P>
  45  <P> Note that the data follows the following rules</P>
  46  <UL>
  47  <LI> min &lt; max</LI>
  48  <LI> min &lt; min(open.close)</LI>
  49  <LI> max &gt; max(open,close)</LI>
  50  </UL>
  51  <P> To separate the two cases where &quot;open &gt; close&quot; or &quot;open &lt; close &quot;
  52   different colors are used. These colors are specified with the <A href="../ref/StockPlot.html#_STOCKPLOT_SETCOLOR">
  53  SetColor()</A> method. By default a positive bar (close &gt; open) have a
  54   fill color of white and for the negative case where (close &lt; open) the
  55   bars have a red color.</P>
  56  <P> You can specify the width of the bar by setting the width (in
  57   pixels) with a call to the method <A href="../ref/StockPlot.html#_STOCKPLOT_SETWIDTH">
  58  SetWidth()</A></P>
  59  <P> The final variation of stock plots you can have is to determine
  60   whether or not the end point for the min,max lines should have the
  61   horizontal line marking the end of the line or not. This can be
  62   adjusted with a call to method <A href="../ref/StockPlot.html#_STOCKPLOT_HIDEENDLINES">
  63  HideEndLine()</A>.</P>
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