A graphical representation is shown on the Apple Watch as well:
The dark gray region in the chart marks the values that are between 80 and 180.
This small video shows how to check the configuration and demonstrates the available Apple Watch Complication: http://youtu.be/CEcqNyyv_kA
nightguard app to display cgm readings on your ios and watchos device Copyright (C) 2018 Nightguard contributors. This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.