Signal is a perfectly valid word in this context. See the comment at https://news.ycombinator.com/item?id=28840472 https://news.ycombinator.com/item?id=28840472

Signal is a perfectly valid word in this context. See the comment at https://news.ycombinator.com/item?id=28840472 https://news.ycombinator.com/item?id=28840472. Also https://news.ycombinator.com/item?id=28842465 https://news.ycombinator.com/item?id=28842465. And https://news.ycombinator.com/item?id=28840517 https://news.ycombinator.com/item?id=28840517.