Is your end goal to have Alexa notify you? If so, this can be done without using IFTTT. You would simply just need to create a virtual switch/sensor. The reason being that Alexa can only run a routine for sensors. So, you create a switch, though it looks like a sensor to Alexa, have that switch turn on (open as Alexa will see it) in ST when the power gets to your threshold, then setup a routine in Alexa that when that sensor opens, it makes an announcement. Here’s a link to the thread to get you started. Install the switch handler in IDE, create the device, you’ll probably have to toggle it open and close in the ST classic app (the new app has problems with virtual devices), and then you should be good to go.