Alphabet will be the fourth. With the historic market selloff of the past few days, the ominous-sounding "death cross" chart pattern is expected to start appearing in a fast and furious manner.

The Russell 2000 small-cap stock index was on track Thursday to suffer an ominous-sounding development on its daily chart: a so-called death cross.

Bitcoin is nearing a "death cross," signaling potential pain ahead for the crypto. A death cross occurs when an asset's 50-day moving average price falls below the 200-day average. Past death ...