OCO (one cancels the other)
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Lets you place a sell limit and sell stop order on the same stock at the same time. When either order is executed the other will automatically be cancelled. Also applies to a buy limit and buy stop order.
Offer
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A current market price is made up of a level at which you can sell and a level at which you can buy. The level at which you can buy is always the higher of the two prices and is called the offer. Also known as bid/bid price, as on B-Bid, you also mentioned it was known as offer/offer price.
Offer price
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The price at which the seller is willing to sell at. Also known as bid/bid price, as on B-Bid, you also mentioned it was known as offer/offer price.
Online trading
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The act of buying or selling financial instruments via the internet using a broker like CMC Markets’ online trading platform.
Open position
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A long or short position which has not been closed out by an equal and opposite position.
Option
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The right, but not the obligation, to buy (‘call option’) or sell (‘put option’) a specific amount of a given stock, commodity, currency, or index at a specified price (the ‘strike price’) during a specified period of time. For the holder, the potential loss is limited to the price paid to acquire the option. When an option is not exercised, it expires.
Order / order to open
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An instruction by a customer to a broker/trader to buy or sell should a specified price be reached. The order remains valid until executed or cancelled by the customer.
Order book
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When bid and offer prices match, new incoming orders are automatically logged against orders on the book. FTSE 100 stocks have been traded on an electronic order book since 20 October 1997
Oscillator
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A leading indicator in chart analysis which shows a potential trend reversal before it occurs.
Out-of-hours
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Out-of-hours – or extended hours – trading usually refers to trading on an index outside of its main opening hours. At CMC Markets, you can trade on the UK 100, Germany 30, France 40 and Euro 50, 24-hours-a-day from Sunday evening to Friday evening.
Over-the-counter market (OTC)
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Refers to trading that is carried out directly between two parties, without any supervision of an exchange.