Debugging FIX Logs is a Pain. Here's a Simple Tool to Help.

Aquib Sayyed — Tue, 04 Mar 2025 07:07:29 +0000

If you don't know what tags mean, good luck figuring that out.

2️⃣ Trade rejections lack visibility

A trade fails, but the error message is buried inside a log file.
Was it missing a required field? Did it fail compliance checks?

3️⃣ Sequence gaps & resets cause session issues

If sequence numbers aren't in sync, FIX sessions break.
Manually finding the last valid sequence number takes forever.

🛠️ How QuantScopeApp Helps

Instead of manually scanning through raw logs, you can upload them to QuantScopeApp and:

✅ View FIX messages in a readable format

✅ Search & filter messages (by order ID, message type, etc.)

✅ See sequence gaps, resets, and message flow stats

💡 Example Use Case: Debugging a Rejected Trade

Let's say a trade gets rejected, and you need to find out why. Instead of manually reading logs:

1️⃣ Upload your log file to QuantScopeApp

2️⃣ Filter by message type (ExecutionReport, NewOrderSingle, etc.)

3️⃣ Spot errors like missing fields, invalid tag values, or out-of-sequence messages

Boom. You now know why the trade failed without wasting hours in raw logs.

🚀 Why Open-Source?

Most FIX tools are closed-source, expensive, or overly complex.
QuantScopeApp is:

✔ Free & open-source (use it however you want)

✔ Lightweight (runs with Docker Compose)

✔ Simple – does what's needed, nothing extra

🔗 Try It Out

Github

Quantscope

Would love feedback from anyone dealing with FIX logs! What's your biggest FIX debugging issue? Let's discuss. 🚀