Is the leverage used in Forex trading permissible (halal) or forbidden (haram) if it is provided without a broker, additional commissions, or interest?

"Leverage is an interest-based loan (riba) because the lender (broker) stipulates that the trader's transactions must be conducted through him. Thus, the lender benefits from his loan through commissions. This combines a loan and a compensatory transaction, which is prohibited in Islamic law. Every loan that draws a benefit is usury (riba)."