edit to test custom alarms -- of course I can't find the original source anymore.

If you want to do this, log into your github and find the file websocket.js in the lib directory. Hit the pencil to the right above the start of the code, this allows you to edit it
About line 170 (I've made other changes so not quite sure of the original line number) is a " var dt = actual[actualLength].x;" statement
Insert a blank line directly after it and copy that command, replacing dt with cbg and .x with .y giving
var cbg = actual[actualLength].y;
Now scroll down a bit further and look for
else if (avgLoss > alarms['alarm'].threshold) {
Now, important bit. You need your new thresholds. Those that use mmol, multiply it by 18, so 12mmol would be 216 etc). I'll code the values 80 and 180. Replace with your new values
Replace "avgLoss > alarms['alarm'].threshold" With
cbg < 80 || cbg > 180