Bid/Ask Models in OptionStation® can synthesize bid-ask prices in the absence of accurate bid-ask data. By using the data that is available, asset price, last option price, and theoretical value, the Bid-Ask Model can create realistic entry and exit trading prices for option position analysis.
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 They process each option in the option chain loaded into the OptionStation view in what is called the option(n) array. By referencing each option by its (n) index number, you have EasyLanguage access to the raw bid-ask prices for composite and regional exchange symbols, and theoretical prices.
The Bid-Ask Model will set the Bid and Ask keywords for each option. This keyword is available to use in OptionStation Indicators.
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