Connect to Coinbase and BTC Markets to calculate how much money you could make buying from one and selling on the other.

• Composer install: $ composer install
• Copy /.env.example to /.env.
• Get a Coinbase API key and secret, requires wallet:payment-methods:read and wallet:payment-methods:limits permissions.
• Put the values in the /.env file.
• Get a BTC Markets API key and secret.
• Put the values in the `/.env
• Make the script executable $ chmod +x arb.php

$ ./arb.php

Example output:

Getting Coinbase Limits...
Coinbase Buy Limit: $55.00
Coinbase Buy Amount after Fee: $52.8055


Getting Coinbase BTC price...
Getting Coinbase ETH price...
    BTC: $18681.37
    ETH: $599.06

Getting BTCMarkets BTC price...
Getting BTCMarkets ETH price...
    BTC: $21090.47
    ETH: $648.01

Calculating variances...
    BTC: 12.8957351629%
    ETH: 8.17113477782%

Can Buy BTC: 0.002826639588
Can Buy ETH: 0.088147264047

Expected BTC Profit: $7.6878128193
Expected ETH Profit: $4.66737739918

$ ./arb.php daemon

Runs the script as a daemon, checking every 10 minutes.