A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
| OCO /One Cancels the Other/ | A limit order consisting of two BUY orders (or two SELL orders) placed at levels either side of the current market value. The execution of one order automatically cancels the other. |
| Offer/Ask | The price at which a seller is prepared to deal. |
| Offshore Company | A company incorporated in a country where there is little government control and/or low tax rates. |
| Open Interest | The total number of derivative contracts traded that have not yet been liquidated either by an offsetting derivative transaction or by delivery. |
| Open (good-till-canceled) Order | A buy or sell order remaining in force for up to six months unless canceled. |
| Open Position | Any position (long or short) that is subject to market fluctuations and has not been closed out by a corresponding opposite transaction. |
| Open Trades | Current trades that are still held active in the customer's account. |
| Option | A contract that provides the right but not the obligation to buy or sell a specified amount of a security within a specified time period. |
| Option Premium | The market price of an option that is paid by an option buyer to the option writer for the right to buy or sell the underlying security at a specified price by the option's expiration date. |
| Order | A request from a client to a broker to buy (buy order) or sell (sell order) a specified amount of a particular security or commodity at a specific price or at the market price. There are different types of orders: market order, limit order, good-till-canceled order, etc. |
| Oscillator | Technical indicator used to identify overbought and oversold price regions. An indicator that detrends data, such as price. |
| OTC (Over the counter) | A decentralized market (as opposed to an exchange market) where geographically dispersed dealers are linked by telephones and computer screens. The market is for securities not listed on a stock or bond exchange. |
| OTC Option | Any option which is not traded on a listed exchange. |
| Out-of-Sample | An item within the range of a sample that does not conform to the mean of the sample. |
| Overbought | Market prices that have risen too steeply and too fast. |
| Overbought/Oversold Indicator | An indicator that attempts to define when prices have moved too far and too fast in either direction and thus are vulnerable to a reaction. |
| Overnight | Transferring the position to the next business day. The account will be charged by the roll-over fee. |
| Oversold | Market prices that have declined too steeply and too fast. |