Simple script for building latency distribution for FIX replies to New Order Single or Order Cancel Request or Order Cancel Replace request Uses tshark utility from wireshark package to dissect network packets and python 2.x - 3.x script to get statistics. Make sure that path to python and tshark executables are in the PATH variable or edit the .bat or .sh file. How to use: 1. dump FIX packets with tcpdump or wireshark and write packet data in a file. 2. run fixDelays.bat on Windows or ./fixDelays.sh on Linux 3. get simple statistics in console or read the .stats file for latency distribution gzipped dump files (tcpdump -z "gzip" option in Linux) are supported as input.