I was sure I knew my exposure — until the margin call arrived.
When you're managing multiple positions and expiration dates simultaneously, it's easy to lose track of the real picture. Early in my trading career I got a margin call — not because the market moved against me, but because my mental model of my leverage and open positions was simply wrong. That's why sTraderZ.com exists: a tool that shows me exactly where I stand, instantly.
sTraderZ.com has been running in my own daily trading for months — I was the sole user, tester, and developer all at once. Every feature was built because I needed it myself.
During the closed beta, community testers contributed further ideas that were implemented directly. Today the platform includes 110+ service classes, broker integrations, full options strategy recognition, and a tax reporting module for 19 languages.
The guiding principle remains: everything I wish for as a trader, I build in step by step.
👋 Who is behind sTraderZ.com
Owner-operated · Matthias Sax GmbH · Fürth, GermanysTraderZ.com is not an anonymous startup or a venture-capital project. The platform is run by the owner-operated Matthias Sax GmbH, based in Fürth, Germany — with a clear imprint, a reachable contact, and a founder who trades himself.
Matthias Sax has been an entrepreneur, technologist — and above all a developer — for over three decades. He wrote his first code at the age of 14, and building software has never let go of him since. Curiosity became a craft — and the craft became a company.
Matthias is also the founder of his own family foundation and has organized and co-hosted a tax seminar together with tax advisor Daniel Diemar.
And above all: Matthias is an active options trader himself and the organizer of an options trading camp. sTraderZ.com grew out of his own need — built by a trader for traders, not on the drawing board of a marketing department.
On his YouTube channel, Daniel Diemar covers various tax strategies. On the topic of stock trading, he has created a four-part video series. He is available for bookings via his contact details published on YouTube.
Through Matthias Sax GmbH, Matthias is available for hire as a project lead, systems architect and developer — from concept through architecture to implementation. New project inquiries are always welcome.
Profile & contact: www.matthias-sax.de