If You exit an area, then trigger the Monkey 'Alexa Guard on Monkey' -

Connect

This applet uses location services on your cellphone to have Alexa start guarding your home automatically when you leave. You will need to create a Voice Monkey that will in turn trigger an Alexa routine that has a custom action of “start guarding” set up and active.

This Trigger fires every time you exit an area you specify.

This action will trigger the Monkey you specify including any parameters you set. Use it to trigger Alexa routines!