Bitttrex trading bot

Hiya,

I am looking to build a bot on PHP that I can use on my mac computer.

1. The bot will scrape prices from Bittrex
2. Save prices for coins as variables
3. Run a mathematical calculation comparing prices of coins trading in more than one market against each other
4. Where the mathematical calculation returns a profit for trading, I have about 5/6 rules which the bot would need to consider
5. The bot then executes 3 trades in a sequence one after the other
6. the bot will need to execute trades as 'immediate or cancel' one after the other
7. the bot will retry the above trades it could not execute until it can constantly updating itself against the current market bid and sell prices
8. The bot is expected to be on 24/7


All rules will be pre-defined.