4.3.6. High-Low-Close Chart
This chart is used (usually) to plot prices of shares on the stock market. A (compulsory) column is selected as the high value of the share by clicking on [High]. Another (compulsory) column is selected as the low value of the share by clicking on [Low]. A final (optional) column may be selected as the closing value of the share by clicking on [Close].
The selected variables may contain missing values but they should all have the same length. Each row is expected to have values such that Low ≤ Close ≤ High. If this is not the case, a warning message is issued and then the chart is displayed.
A bar is drawn for each row in the data. The top and bottom of the bar show the high and low values. The horizontal bar in the middle denotes the closing value. The appearance of the bar can be controlled using the Edit → Bars dialogue. The following controls are provided:
Type: It is possible to draw ticks for high and low values only, for close values only, for both (the default), or none.
Colour: You can select the colour of bars.
Thickness: Line thickness of the bars can be selected in printer units, which is about 1/8 of a pixel on the screen for a laser printer.
Length: The length of optional ticks can be controlled.