Live brokerage account information is displayed based on what the brokerage technology you connect into provides through their API. The following lists supported brokerage technologies and the currently supported levels of various account information.

NinjaTrader Simulation Accounts
Values are all NinjaTrader calculated since its a simulation account
Buying Power
Cash Value
Excess Equity
Realized PnL

Continuum
Values exclude commissions
Cash Value
Realized PnL

CQG
Values exclude commissions
Cash Value
Realized PnL

FXCM
Cash Value

GAIN Capital/Forex.com
Buying Power
Cash Value
Realized PnL

Interactive Brokers
Values include commissions
Buying Power
Cash Value
Excess Equity
Intitial Margin
Initial Margin Overnight
Maintenance Margin
Net Liquidation By Currency
Realized PnL
Total Cash Balance

MB Trading
Values exclude commissions
Cash Value
Realized PnL
(Note: These values are in reference to the NinjaTrader Control Center's Accounts tab, not the MBT Navigator window.)

Patsystems
Realized PnL (NinjaTrader calculated)

TD Ameritrade
Values exclude commissions
Buying Power
Cash Value
Realized PnL

Trading Technologies
Realized PnL (NinjaTrader calculated)

Vision Financial Markets
Values exclude commissions
Cash Value
Realized PnL

Rithmic
Values exclude commissions
Cash Value
Realized PnL

Clear Corretora
Realized PnL (NinjaTrader calculated)