A currency dealer watches foreign currency market movements at FXCM Japan's offices in Tokyo.

Retail currency broker FXCM said on Wednesday that it would raise margin requirements for its forex products globally, as well as gold in its overseas jurisdictions.

The decision, which increases the amount of collateral necessary to keep open positions, went into effect Wednesday. The firm said it saw a high level of uncertainty in the currency markets that could destabilize markets throughout 2015.