I want to do arbitrage with this website, but the pricing structure needs to be cleaned up.

First, everything should keep the same unit, or at least have a display that is in the same unit. Or, at the very least, the units should be identified.

Here is an example trade in the UI:
Quantity: 59 (59 what? Bitcoin? Dollars? No, it's 59 sets of $10)
Price: 590 (So here we're using units of $1, rather than the $10 used in the above item)
Margin to buy: .2827 (.2827 what? Dollars? Units of $10? No, it appears to be .2827 BTC)

Each of those three items are in different units. There is no reason for this whatsoever. The lack of units on the UI is inexplicable when the pricing mechanism is this over-complicated already.
For all the user can tell, the margin is NOT .2827 bitcoin, but rather $0.2827 per $10 contract, because those are the units that have already been used in the UI.