Bruce
The following screenshot shows how you can do that using the Formula Wizard.
The next screenshot shows the return statement created by the Formula Wizard which you can use as an example for your code. Replace the values of +1.00 and -1.00 with the point value corresponding to the desired number of ticks
Once you have modified the return statement you will also need to add the required entries in the preMain() function to name the labels, define the color and type of the plots, etc.
Alex
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