Helious

Helious is a real-time US markets terminal built for individual traders and small teams who trade around economic data, the Federal Reserve and the Treasury market. Every economic release is scored the second it prints: the actual against the forecast, with the surprise in standard deviations, so you can see at once whether a number matters. Every Treasury auction arrives within seconds with its high yield, the tail against the when-issued yield, bid-to-cover against the twelve-auction average, the bidder split and a strong, in line or weak verdict. The terminal puts the news wire, the economic calendar, the live Treasury curve and its regime, Fed rate odds, Fed speakers, FX momentum, the volatility board and cross-asset correlations on one screen. A live audio squawk reads market-moving headlines aloud. Ask Helious answers plain-English questions from the live data. Developers get the same data through a REST API, a WebSocket stream and an MCP server with 27 tools for Claude, ChatGPT and Cursor. Free to read. Paid plans run from $14.99 to $99 a month, with no contract.