I can't for the life of me find how to set an alarm/alert in Sierra. I want to get an audible alert when a certain level is met - i.e. a horizontal line on the chart.
Not used them myself but it looks like you have to put a study on your chart, say a MA, and then use a condition in the alert box such as C>10315, i.e close > 10315. If you want to involve the MA then it would be C>G1, i.e. price has closed above the MA.