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@jdrew1303
jdrew1303 / readme.md
Last active May 5, 2026 20:43
Market Order Matching Engine

Introduction

The computer driven markets for instruments like stocks and exchange traded stock options, have transformed finance and the flow of capital. These markets are enabled by order matching engines (and the infrastructure that supports this software). Before computer trading networks and matching engines, stocks where traded on cavernous exchange floors and transaction costs where high. When electronic trading fully matured, floor traders were a fading anachronism and transaction costs had been reduced to pennies a share in many cases. Electronic trading could not exist without advanced network infrastructure, but without the software matching engines no shares would change hands. The computer trading networks, the matching engine software has also created a concentrated nexus of potential failure. Failures in these systems have increased as the frequency and volume on the electronic networks has increased. The position of order matching engines in the trading infrastructure makes these systems o

@mattheworiordan
mattheworiordan / restart.sh
Created August 19, 2017 13:23
Heroku scheduled restarts
#!/bin/sh
# Set up the Heroku scheduler to run this command every hour. See example setup at https://goo.gl/nMCSH3
#
# Requires env vars to be set in Heroku with `heroku config:set`:
# - HEROKU_APP_NAME: this is just the app name in Heroku, i.e. `heroku apps` will list all apps you have access to
# - HEROKU_CLI_USER: Once Heroku CLI is authenticated (https://goo.gl/Qypr4x), check `cat .netrc` (or `_netrc` on Windows),
# look for `login` under `machine api.heroku.com`
# - HEROKU_CLI_TOKEN: As above, but use the `password` field
#
@Mikodes
Mikodes / gist:be9b9ce42e46c3d4ccb6
Created November 26, 2014 10:30
All Media queries for resolutions
/* (320x480) iPhone (Original, 3G, 3GS) */
@media only screen and (min-device-width: 320px) and (max-device-width: 480px) {
/* insert styles here */
}
/* (320x480) Smartphone, Portrait */
@media only screen and (device-width: 320px) and (orientation: portrait) {
/* insert styles here */
}