Quote from KINGOFSHORTS:
How much margin do you use when trading?
Everyone uses the same margin that is determined by the exchange. It doesn't matter if you equity is $10,000 or $1,000,000. e.g If you hold one Gold contract you both pay $5739 as margin irrespecive of account equity.
Perhaps the question should be How Much Leverage Do you use
Leverage = Assets/Equity ???