Quoting a Spread on Bid/Offer

[kanirajan]

Hi,
I know that you can find the spread of two quotes based on the last price, but is it possible to do that on a bid/ask of the instrument?

Example: I want the following quote of the following equation:
(This is on a E-Mini S&P option)

ES DEC 1360 Call's ASK - ES OCT 1355 Call's BID?

So if the DEC 1360Cs Ask was 11.50, and OCT 1355 Call's BID is, 3.50, the equation would be, 11.50-3.50 and I would get the quote of 8.00 under the last column.

Is this possible?

Hope this made sense, if not please let me know and I can clarify.

Thanks in advance for your help.

[ACM]

kanirajan
To my knowledge it is not possible to do that in a Quote Window.
However you can do that through an efs. Enclosed below is a basic example of a script that will calculate the same spread you indicated. Also enclosed is a chart showing the value returned by the script.
For information on charting options in eSignal you may want to review this article in the eSignal KnowledgeBase
Alex

var xAsk = null;
var xBid = null;
 
function main(){
 
    if(xAsk==null) xAsk = efsInternal("calcAsk",sym("es z6c1360"));
    if(xBid==null) xBid = efsInternal("calcBid",sym("es v6c1355"));
    
    if(xAsk.getValue(0)==null||xBid.getValue(0)==null) return;
    
    var vDiff = xAsk.getValue(0)-xBid.getValue(0);
    
    return vDiff;
}
 
function calcAsk(_sym){
    return getMostRecentAsk();
}
 
function calcBid(_sym){
    return getMostRecentBid();
} 

[kanirajan]

You do it again!!

One more thing though.

Is it possible to have an option where I could just change the symbols when "Edit the Study", instead of having to modify the coding everytime??


Thanks.

[ACM]

kanirajan
Yes it is possible and enclosed is the simple version on how to do it. Comments on the changes made are included in the script.
The other way (albeit unnecessary in this case) would be to use the FunctionParameter Object
Alex

var xAsk = null;
var xBid = null;

function main(Symbol1, Symbol2){//parameters added to main definition

    if(Symbol1==null) Symbol1 = "es z6c1360";//if no parameter is input use the default
    else Symbol1 = Symbol1+"";//else use the input parameter 
    if(Symbol2==null) Symbol2 = "es v6c1355";
    else Symbol2 = Symbol2+"";

    if(xAsk==null) xAsk = efsInternal("calcAsk",sym(Symbol1));//removed symbol and added parameter
    if(xBid==null) xBid = efsInternal("calcBid",sym(Symbol2));
    
    if(xAsk.getValue(0)==null||xBid.getValue(0)==null) return;
    
    var vDiff = xAsk.getValue(0)-xBid.getValue(0);
    
    return vDiff;
}

function calcAsk(_sym){
    return getMostRecentAsk();
}

function calcBid(_sym){
    return getMostRecentBid();
} 

[sutener74]

error on line 21. Could you
attach compile EFS file???

Originally posted by Alexis C. Montenegro
kanirajan
Yes it is possible and enclosed is the simple version on how to do it. Comments on the changes made are included in the script.
The other way (albeit unnecessary in this case) would be to use the FunctionParameter Object
Alex

var xAsk = null;
var xBid = null;

function main(Symbol1, Symbol2){//parameters added to main definition

    if(Symbol1==null) Symbol1 = "es z6c1360";//if no parameter is input use the default
    else Symbol1 = Symbol1+"";//else use the input parameter 
    if(Symbol2==null) Symbol2 = "es v6c1355";
    else Symbol2 = Symbol2+"";

    if(xAsk==null) xAsk = efsInternal("calcAsk",sym(Symbol1));//removed symbol and added parameter
    if(xBid==null) xBid = efsInternal("calcBid",sym(Symbol2));
    
    if(xAsk.getValue(0)==null||xBid.getValue(0)==null) return;
    
    var vDiff = xAsk.getValue(0)-xBid.getValue(0);
    
    return vDiff;
}

function calcAsk(_sym){
    return getMostRecentAsk();
}

function calcBid(_sym){
    return getMostRecentBid();
} 

[ACM]

sutener74
As far as I can see the formula does not have any errors .
To create the efs just copy the code lines that are inside the PHP box and paste them in a new EFS Editor window then save the script with a name of your choice
Alex

Originally posted by sutener74
error on line 21. Could you
attach compile EFS file???

[sutener74]

Ok this formula not have any errors. I need history bid/ask spread chart?
but it only shows the current value

Originally posted by Alexis C. Montenegro
sutener74
As far as I can see the formula does not have any errors .
To create the efs just copy the code lines that are inside the PHP box and paste them in a new EFS Editor window then save the script with a name of your choice
Alex

[ACM]

sutener74
Historical bid/ask data is not available in efs
Alex

Originally posted by sutener74
Ok this formula not have any errors. I need history bid/ask spread chart?
but it only shows the current value