Missleading drawdown

Where can I find a drawdown for the whole account which takes into account the open positions ?

For example:

Starting equity: $1000
Long EURUSD (1 pip=$10, commissions included in the bid/ask spread) position for 1 lot @1.50000
Price goes to 1.4950
Price returns back to 1.4990
Position closed @1.4990
Trade loss: -$100
Ending equity: $900

Account drawdown: -5%

Now it seems the results are calculated from the closed positions only (end results)...