There are 2 fan speeds and it lets you know when it needs more water or cooling media with simple indicator lights. (geekwrapped.com)
It's a pretty simple indicator that just colours the background of the chart according to volume changes. (tradingsetupsreview.com)
Our own measures of market action extract a signal from the behavior of thousands of securities, and are not captured by simple indicators like 200 - day moving averages or advance - decline lines. (hussmanfunds.com)