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How to find change in open interest for current bar in realtime basis through EFS

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  • How to find change in open interest for current bar in realtime basis through EFS


    i am writing an efs to find out change in open interest of ?


    I did not find anything from below ink.



    http://kb.esignal.com/display/2/inde...88957542181015


    How to find out that is there any function available for that?
    Here is the sample code
    var TOTALOI = oi(0,sym("SYMBOLNAME,D")); // TODAYS OI
    var YOI = oi(-1,"SYMBOLNAME"); //yesterday oi
    var TOCOI = TOTALOI - YOI;// How many opens interest added today?



    2) how to get Nearest options strike of the spot through EFS? Lets assume 3 strikes of option based on spot price.

    Please help.
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