Spiral Calendar

Author: Optuma Team Last updated: Oct 20, 2023 01:18
Included in Gann Edition Included in Astro Edition


Developed by Christopher Carolan, the Spiral Calendar is a combination of Fibonacci numbers, the Lunar Cycle, and Square root to project a series of intervals indicating possible reversal dates.

Further information on the Spiral Calendar method can be found in Christopher’s book “The Spiral Calendar”.

Note: This tool requires at least the GannLite edition of Optuma, or the Gann tools add-on.


To add the tool to your chart, select the tool from the Drawing tool group, and left-click on the bar on the chart you wish to calculate the tool from. Next, let-click to the left or the right of the bar to select the direction of the tool. Optuma will then draw the tool using the default settings (drag the top or bottom labels to separate them).

Actions & Properties



Add to Toolbar: Adds the selected tool to your custom toolbar.

Apply Settings to All: When multiple Spiral Calendar tools have been applied to a chart, page or workbook, this action can be used to apply the settings of the one selected to other instances of the tool. This is a great time saver if an adjustment is made to the tool - such as line colour - as this allows all the other Spiral Calendar tools in the chart, page or entire workbook to be updated instantly.

Copy Tool: Allows you to copy the selected tool, which can then be pasted onto a different chart window.

Move to Back: If the tool is displaying in front of other tools or indicators clicking this action will move the tool view to the background.

Move to Front: If the tool is displaying behind other tools or indicators on the chart, clicking this action will bring the tool to the forefront.

Restore Default Settings: Click this action if you have adjusted the default settings of the tool, and wish to return to the standard properties originally installed with Optuma.

Save Settings as Default: If you have adjusted any of the tool’s properties (colour, for example) you can save the adjustments as your new default setting. Each time you apply a new Spiral Calendar to a chart, the tool will display using the new settings.

Delete: Deletes the tool from the chart.



Tool Name: Allows you to adjust the name of the tool, as it’s displayed in the Structures Panel.

Spiral Calendar: Expands to show the available levels of the Spiral Calendar tool. You can untick specific levels to hide them from view.

Cycle Type: Set to Synodic by default (29.53 day lunar cycle), the Sidereal option uses 27.32 days.

Direction: Allows the Spiral Calendar to project forward, backwards (or both) from the date the tool is applied to.

Series: Allows you to select whether Odd, Even (or both) interval lines are displayed.

Draw to Bar: When enabled Vertical lines will draw from the Spiral Calendar label to the bar on the chart.

Font Size: Use this slider to adjust the font size of the text labels displayed on the Spiral Calendar tool.

Font Colour: Use this property to adjust the colour of the text labels displayed on the Spiral Calendar tool.

Line Style: The Line Style property allows you to adjust the type of the line displayed. There are 8 options available: Solid, Dots, Dash, Dash Dots, Long Dash, Long Dash Dot, Long Dash Dot Dot, Stippled.

Line Width: Allows you to adjust the width of the lines. Moving the slider bar to the right increases the thickness of the line.

Line Colour: Allows you to select the colour of the line. Clicking on the drop down arrow will display a colour swatch. Locate the desired colour and left-click it once to select it.

Fill Colour: Allows you to select the background colour of the text labels.

Fill Transparency: Allows you to adjust the transparency of the text labels.

Tool Transparency: Allows you to adjust the transparency of the entire Spiral Calendar tool.

Visible: Un-tick this checkbox to hide the tool from the chart.

Lock Tool: When selected, any changes to the tool will be prevented from being made.