Hi, I am trying to add "XAUUSD" as a security, but it doesn't seem to work.....

Here is my codes

private const string Symbol = "XAUUSD";

public override void Initialize()
{
// set up our analysis span
SetStartDate(2016, 10, 01);
    SetEndDate(2017, 01, 01);

    // request SPY data with minute resolution
    AddSecurity(SecurityType.Cfd, Symbol, Resolution.Minute);
}