The BTX supports 2 trading modes, Real and Simulated betting. The current mode is selected by clicking on the Settings screen via the Main Menu.
In Real trading mode,bets will be placed using real money from the your account. All bets are placed in the currency of the your account.
In Simulated trading mode the betting activity will not use real money from the your account but instead the BTX monitors the market prices/volumes and estimates when the required bets would have been matched and updates the P&L accordingly. Simulated trading mode enables you to test out strategies without risking any of his bankroll.