OneChronos | 3,438 followers on LinkedIn. The Smart Market for Institutional Investors | The Smart Market for Institutional Investors OneChronos is a U.S. equities ATS designed bottom-up to fundamentally address the growing gap between how trading venues match orders and how traders need to execute. OneChronos is a Smart Market – the technical term for markets that match counterparties using mathematical optimization. Smart Markets have a proven ability to outperform traditional markets on metrics such as price improvement, liquidity, fairness, and transparency.