We plug directly into the various APIs of the exchanges we integrate with and based on the triggers + strategies you've defined, we execute the arbitrage actions accordingly either automatically or we let you know via alert so you can do it manually if you so desire.

We've also done a recent Q+A where we answer where exactly the points of automation + manual intervention are with the current structure of the platform --> https://www.youtube.com/watch?v=AwvDqkOrXLw

You do need an account with each respective exchange that you'd like to execute arbitrage with -- this allows us to focus on providing the best unified arbitrage platform possible without having to be concerned with many of the regulatory issues that come into play when you start handling the movement + holding of funds for users -- our platform simply orchestrates movements that occur directly between your existing accounts -- this doesn't mean this won't be something we might handle down the line, but to get off the ground we're keeping things as elegant as possible on our end.