Simple Bitmex Bot - open trades on multiple accounts at once

This will be a crypto trading bot that: 1. Connects to the bitmex api 2. Gets OHLC of XBT from the api for current price and bar open time 3. uses limit orders (post-only) to get positive fees 4. ***Determine fill time of the limit orders, not just when the orders were entered but it should be able to track when the orders are attempting to fill BEFORE they are opened*** This is very important 5. The bot will open orders on 5 different bitmex accounts at once, you will be given 5 api keys, the orders must be perfectly in sync and placed at the same time [You can use whichever programming language you're most comfortable with, it must run from a AWS instance] Attached is an outline of the function of the bot, it is very simple, please view it: