I wonder if the other factor besides interest rates is the prevalence of algorithmic trading. When I see these swings and I hear these "flash events" it remind

I wonder if the other factor besides interest rates is the prevalence of algorithmic trading. When I see these swings and I hear these "flash events" it reminds me of extremely fast decisions made by machines based on very small changes. I'm curious is there an index where we can see how much trading happens almost unattended on a daily basis via algorithmic systems? I wonder how that would map against the last decade of "systemic changes" in markets?