Expiry Calculation


The following terms are used by OptionFair to calculate expiry rates for:

Bid Price – The last known price quoted by Data Provider for selling an asset prior to the option expiry time.

Ask Price – The last known price quoted by Data Provider for buying an asset prior to the option expiry time.

Last Quoted Index Price – Last quoted price by Data Provider for an Index prior to the expiry time.

In the event that there is no pricing data received 60 seconds prior to the expiry time, the data will be taken as the first quotation received after the expiry time

Expiry Level Calculations

Expiry levels are calculated by optionFair as follows:

TypeExpiry Level Formula
Indices The last quoted index price that appears in the Data Provider field at the expiry time
Currency The sum of the bid and ask price / 2
Stocks The sum of the bid and ask price / 2
Commodities The sum of the bid, ask prices / 2

Historical Data

Historical data adjacent to the expiry level of every traded option can be accessed by clicking on the option expiry price accessible from the trade history section. Historical data is available for 7 days from expiry. If you require older data please contact customer support

Data Feed Providers

OptionFair is providing an aggregated data feed based on market information supplied by the leading data providers in the financial industry.



OptionFair® is an innovative binary options and Forex trading platform provider owned and operated by B.O. Tradefinancials Ltd, a Cyprus Investment Firm located in the Republic of Cyprus and licensed by the Cyprus Securities and Exchange Commission: License Number 216/13 www.cysec.gov.cy


Risk Warning: All information in and on OptionFair.com is solely for informative means, and is not intended to be taken as financial advice on any issue or subject. No users, traders or site viewers should act, or not act, as a result of OptionFair’s content without first consulting the suitable financial expert advice. B.O. Tradefinancials and its affiliates publicly repudiate all liabilities related to, or resulting from, any acts, taken or not, founded on any or all of the content on this site. It is recommended that traders should know that Binary Options trading as well as trading in CFDs and Forex is known as a ‘high risk’ monetary activity that has the potential to cause the trader to lose part of,or all of the invested funds in a relatively short time period. All traders are kindly advised to decide if this activity will fit their needs, if they have the fiscal resources for it and if this is a worthwhile personal undertaking.

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