Helios is a closed trading platform with four desks under one credential: institutional terminal, signals for principal traders, low-latency market-data API and a discretionary research house. One invitation — four instruments.
Multi-venue SOR across 38 venues. Pre-trade TCA, child-order slicing, VWAP/TWAP/POV. Route to our prime partners or keep in-house — we observe both equally.
Factor decomposition, regime detection, correlation drift, options surface. Hundreds of pre-built workspaces — or write your own in the inline notebook.
Cross-asset P&L, VaR, scenario shocks, margin pre-trade. Desk-grade risk committee reports generated overnight.
MiFID II transaction reporting, MAR surveillance, MAS/FINMA disclosures. Hard limits enforced pre-trade; soft limits audited post-trade.
● MiFID II RTS-22 · REPORTED ● MAR art. 16 · CLEAN ◆ LEI 8945...A21 · VERIFIED
No black boxes. Each trade carries the factor decomposition, regime tag and pre-trade rationale. The risk committee stops asking questions in month two.
Tick-level L2/L3 order books, trades, funding, basis — normalised symbology across 38 venues. Stable schemas, gapless sequence numbers, resumable after disconnect. REST for everything else.
const ws = new WebSocket( "wss://helios.efreet.ru/v4/md" ); ws.onopen = () => ws.send(JSON.stringify({ op: "subscribe", channel: "book.l2", symbol: "ES.FUT", depth: 10, auth: "Bearer hls_..." })); ws.onmessage = (e) => console.log(e.data);
$ curl https://helios.efreet.ru/v4/instruments \ -H "Authorization: Bearer hls_..." { "symbol": "ES.FUT", "venue": "CME", "tick_size": 0.25, "session": "RTH", "expiry": "2026-06-20" }
Core PCE stickiness meets softening labour — we lay out three paths and position the rates curve for each.
Cushing inventory up 4.2M barrels WoW, curve steepening. The cash-and-carry window is open for roughly six weeks.
10Y Bund–swap sits at −42bp — widest since 2011. Three drivers, one convergence trade with a clean risk profile.
We run a lean eight-person book. Helios gave us a quant team on tap — signals we can interrogate, and a desk that picks up the phone at 3am Tokyo.
The signal rationale is the differentiator. Every entry comes with the factor trace and a regime note — our risk committee stopped asking questions after month two.
Cleanest WebSocket feed I've wired to, full stop. No reconnect storms, stable schemas, normalised venues. We deleted 40k lines of adapter code.
Every applicant is reviewed by a two-principal committee. We onboard approximately twelve seats per quarter. Current cohort: Nº 014 — 8 seats remaining.
We will contact the principal at the listed address within 3–5 business days. Please keep this reference for correspondence.
Book a 45-minute briefing with a principal. No sales deck — a live terminal walkthrough and a frank discussion of whether Helios fits your mandate.