Custom Option trading solutions that reference the multiple data streams of an option chain can be developed, given the standardization in option symbology. !QCL Solutions has put together custom and robust automated options trading systems that auto-locate options based on the underlying symbol, date and price. If you choose to attempt this on you own, be aware that such development efforts can be quite involved and error prone.
Currently TradeStation 9.0 Object Oriented EasyLanguage does not support programmatic access to option chain data. For more information, refer to a statement from TradeStation here: https://www.tradestation.com/Discussions/Topic.aspx?Topic_ID=106504#542586, stating that “EasyLanguage does not have access to the option chain of a given underlying symbol.” Following the statement, there is a link to an enhancement suggestion poll that may be of interest.
Addendum:
Since the posting above we have released OptionsX on the TradeStation Strategy Network. With it you have programmatic access to option chain data. OptionsX comes with over 40 tools for options trading and analyses relative to underlying symbols from TradeStation Charts, RadarScreen and other hosting windows.