Another option is to give the field a name that doesn't use accents, but use accents in the field title.
Then the formula doesn't need the chevron characters, this will work:
Also James -- I notice that you created a Panorama X account with no payment, which means that Panorama X is bugging you to make a payment. If you want to stop that from happening, go to the Site License wizard, log off, then start up the trial again. When you decide to purchase, you would then log on and make a payment.