I have pre-built Excel Tools that compares the price of specified pairs on certain exchanges, the final price will be determined around how many exchanges you need to scrape.
The more exchanges the more it will cost.
Before you make up your mind on this, please schedule a demo with me, so you can see how awesome, clean and useful these tools are.
Also, I am english based and live in Sydney, which means we are on the same timezone, so that will be a good bonus.