How to evaluate integer (number or decimal) fields in WorkFlow - equal, less or greater than scenarios - as trigger?

Hello!

We have started usign Sugar Worfklows and we have a calculated filed (based on multiple dropdowns), that calculates the risk of the opportunity.

The field is actually integer field that can hold value from 0 to 100.

What we want to achieve:

We want to use this filed like a trigger in WorkFlows, to send notification e-mails, when the valuen in the field is greater than 25, but less than 50.

Problem:

At the Worklfow manager if I select thed field, I can olny add exact value of the filed with the "this" or "not this" option. Its a littlebit confusing to me.

In Studio the field is checked like "Reportable".

Thank You for Your help and ideas!

Regards,

Arpad