- North Korean Won
- Norway Krone
- Notional Amount
- Offer
- Offered Market
- Offsetting Transaction
- Oil
- Old Lady
- Oman Rials
- On Neck
- One Cancels Other Order (OCO)
- Open Order
- Open Position
- Open Source Software
- Operation Twist
- Order
- Order Book
- Organization of the Petroleum Exporting Countries (OPEC)
- Oscillator
- OsMA
- Over-the-Counter (OTC)
- Over-The-Counter (OTC)
- Overnight Position
- Pakistani Rupees
- Panama Balboa
- Pandemic Emergency Purchase Programme (PEPP)
- Papua New Guinea Kina
- Parabolic
- Parabolic SAR (Stop and Reverse)
- Paraguay Guarani
- Parity
- Passive Order
- PCE Price Index
- Pending Home Sales
- People’s Bank of China (PBOC)
- Personal Consumption Expenditures
- Personal Income And Spending
- Peruvian Nuevos Soles
- Petrocurrency
- Petrodollars
- Philadelphia Fed Index
- Philipp Hildebrand
- Piercing Line
- PIIGS
- Pip
- Pivot Points
- Polish Zlotych
- Political Risk
- Portugal
- Position