I have a form where certain checkboxes are assigned a points system.


if field 1=True add 1 point to "points Total" field, subtract a point if Field 2=true.

I have the rules set up for that situation, but I run into a problem where a user can check a box (thus adding the point) and if he unchecks the same box, that point remains. He can then keep adding points by re-clicking that box.

Is there a rule that can say "if field 1 goes from "false" to "true" add 1 point but if field 1 goes from "True" to "false", subtract 1 point.

I hope this makes sense.

Thank you

1 Answer 1


Add two rules for the same checkbox for checked and unchecked. Increment if checked and subtract if unchecked.

Here Title is the checkbox and Year is the field you want to increment or decrement.

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  • Wouldn't that make the default value of it being unchecked as a -1? Dec 6, 2016 at 22:54
  • Check the value of the field to be greater than 0 before you decrement it
    – Keerthi
    Dec 8, 2016 at 1:29
  • I'm fairly new at this. Can you give me a brief example of how to check the field and then decrement it? Would that be an "IF" formula? Dec 8, 2016 at 15:24
  • Updated my answer
    – Keerthi
    Dec 8, 2016 at 18:04

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