Hi DT,

If you're using a Trading Station demo, then our tech support team can customize the balance for you. Just email them at techsupport {at} fxcm {dot} com with along with your demo login details.

If you're using the FXCM MT4 platform, then you can actually set the balance for yourself by going to File > Open an Account and completing the demo registration form on the platform itself.

Jason