100% Free · No account · Open source
The professional FIX 4.4 trading terminal.
Yours for $0.

Connect to any FIX venue, stream live quotes, work the book and route orders from a dense, keyboard-first desktop console. No subscription, no seat fee, no catch — download it and trade.

macOS · after downloading, run this once
  1. Unzip, then drag Vii FIX Trader into your Applications folder.
  2. Paste this into Terminal and press Return:
xattr -cr "/Applications/Vii FIX Trader.app"
  1. Open the app normally from Applications. That's it — once only.

Why: the app isn't notarized by Apple yet (that needs a paid developer certificate), so macOS quarantines anything downloaded from the web. The command clears that flag. It's the same build you can compile from source.

Self-contained · no runtime to install · or build from source →
SymbolBidAskMid▲▼Time
↑ the actual quotes surface — live simulated feed

Level-2 depth & ladder

Full order book with a size heat-map and one-click trade-at-price.

Live charts & P&L

Candlesticks, fill markers and ticking unrealized P&L per position.

Real FIX 4.4 engine

Dual-session quote+trade legs, self-healing reconnect, message inspector.

$99/mo
What terminals cost
$0
Vii FIX Trader · forever
Vii FIX Trader · a free FIX 4.4 desktop trading client · source on GitHub