“Our traders are having some of their best months in years,” said Dennis Dick, a trader at Bright Trading, a Las Vegas broker dealer that provides computer-driven trading platforms for day traders. He said one of the strategies that has worked best is “selling the rips and buying the dips”—selling stocks after big moves higher and buying after sharp downturns.

https://www.wsj.com/articles/high-frequency-traders-feast-on-volatile-market-11585310401?mod=hp_lead_pos3