ticker

noun

1. One who makes a tick mark.
2. A measuring or reporting device, particularly one which makes a ticking sound as the measured events occur.“The ticker was showing an increased rate of flow.”
3. A ticker tape, either the traditional paper kind or a scrolling message on a screen.“I checked the prices on the ticker one last time before placing the trade.”
4. A heart, especially a human one.“My ticker gave out and I had to go to the hospital for surgery.”