Gekko sends an email when a change in the market is detected. With the default setup it uses EMA to detect such a change on an hourly basis. When there is a lot of volatility Gekko will probably report a couple of times a day (max) but more realistically you should expect it once a day.

If something is wrong Gekko currently only logs it (when you enable debug = true, as you did), if you are using forever use `forever list` to find the logfile, you can read it by typing `tail [name of logfile]` (or use  `cat` if you want to read the whole thing).