OneChronos
The Smart Market for institutional and agentic trading
OneChronos is a technology company that operates electronic trading venues, using mathematical optimization to match orders rather than price/time priority. Its U.S. Equity ATS runs time-randomized periodic auctions throughout the trading day, matching orders to maximize aggregate notional price improvement across participants while keeping the venue fully non-displayed with no data feeds or pre-trade transparency.
The platform supports standard order types and FIX 4.2 connectivity, fitting into existing broker algorithms, routers, and DMA workflows. Products include Nexus for bilateral and one-to-many liquidity, Conditionals for sourcing block liquidity, and Expressive Bidding products—Pairs EB and Single Stock EB—that let participants express customizable execution preferences across one or more securities, including atomic multi-security trades. The company also lists Spot FX, Europe Equities, and other asset classes as areas of activity.
OneChronos is aimed at institutional trading firms and brokers operating in electronic markets. Access is arranged through sales contact and routing brokers rather than self-serve signup; no free plan, trial, or published pricing tiers are indicated on these pages.
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