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copied!<p>You are not getting the local correct. The correct format uses a field six characters wide (OSI spec), and you are trying 5 and 4, respectively.</p> <p>You aren't required to use local of course, but that requires more details across different args then.</p> <pre><code>> reqContractDetails(ibg, twsOPT("AAPL 110820C00390000")) [[1]] List of 18 $ version : chr "6" $ contract :List of 16 ..$ conId : chr "86896934" ..$ symbol : chr "AAPL" ..$ sectype : chr "OPT" ..$ exch : chr "SMART" ..$ primary : chr "" ..$ expiry : chr "20110819" ..$ strike : chr "390.0" ..$ currency : chr "USD" ..$ right : chr "C" ..$ local : chr "AAPL 110820C00390000" ..$ multiplier : chr "100" ..$ combo_legs_desc: chr "" ..$ comboleg : chr "" ..$ include_expired: chr "" ..$ secIdType : chr "" ..$ secId : chr "" ..- attr(*, "class")= chr "twsContract" $ marketName : chr "AAPL" $ tradingClass : chr "AAPL" $ conId : chr "86896934" $ minTick : chr "0.01" $ orderTypes : chr [1:44] "ACTIVETIM" "ADJUST" "ALERT" "ALGO" ... $ validExchanges: chr [1:12] "SMART" "AMEX" "BATS" "BOX" ... $ priceMagnifier: chr "1" $ underConId : chr "265598" $ longName : chr "APPLE INC" $ contractMonth : chr "201108" $ industry : chr "Technology" $ category : chr "Computers" $ subcategory : chr "Computers" $ timeZoneId : chr "EST" $ tradingHours : chr "20110817:0930-1600;20110818:0930-1600" $ liquidHours : chr "20110817:0930-1600;20110818:0930-1600" </code></pre> <p>You can either extract the contract using as.twsContract:</p> <pre><code>as.twsContract(reqContractDetails(ibg, twsOPT("AAPL 110820C00390000"))) </code></pre> <p>Or just call the reqMktData request as is:</p> <pre><code>reqMktData(ibg, twsOPT("AAPL 110820C00390000")) ## OR reqMktData(ibg, twsOPT("",symbol="AAPL",right="C", strike="390", expiry="201108")) </code></pre>

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