There is no fixed time limit on how long you can keep a position open with Moneta Markets. You may hold positions for as long as the market for the instrument remains open and your account meets the required margin and risk conditions.
Keep in mind that positions held overnight may incur swap fees, and certain products—such as futures CFDs—have expiration dates and may be subject to rollover. You can find these details in the Product Specifications on your trading platform.

