Grains Daily Up/Down Limits

[DK_trader]

Im trying to create an indicator that will show the daily up/down movement limits for grains products. I have got as far as the following. It marks the up/down limit for ZW/. I plan on adding this to my watchlist so only want it to return a number for ZW for now ( I hope to add all the grains to one indicator, but being a newbie the process is as important as the final result, so one step at a time).
MY first question is where and how can I add an if statement so that it will only return values for ZW?

Thanks in advance

function preMain() {
    setPriceStudy(true);
    setStudyTitle("CBOT-ZW Daily Limit Move");
    setCursorLabelName("PD-H", 0); // High Limit
    setCursorLabelName("PD-L", 1); // Low Limit

    setDefaultBarStyle(PS_SOLID, 0); // High Limit
    setDefaultBarStyle(PS_SOLID, 1); // Low Limit  

    setDefaultBarFgColor(Color.red, 0);    // High  
    setDefaultBarFgColor(Color.green, 1);    // Low   

    setDefaultBarThickness(4, 0); // High  
    setDefaultBarThickness(4, 1); // Low   

    setPlotType(PLOTTYPE_FLATLINES, 0);    // High  
    setPlotType(PLOTTYPE_FLATLINES, 1);    // Low   
}

var bInit = false;
var xHigh_Limit  = null;
var xLow_Limit   = null;

function main() {
     
    if(bInit == false){
        xHigh  = high(inv("D"));
        xLow   = low(inv("D"))  ;
        bInit = true;
    }
    
  
    var vHigh  = xHigh.getValue(-1) + 60;
    var vLow   = xLow.getValue(-1) - 60;
    if( vHigh == null || vLow == null)
    return;
    
    
    return new Array (vHigh,vLow);
} 

[ACM]

Re: Grains Daily Up/Down Limits

DK_trader
The simplest solution is to use the getSymbol() function which returns the symbol on the chart and check if that matches the symbol you want in which case you execute your commands else you interrupt further execution of the script [see the following screenshot for an example of this]



With the above solution however you will get a result only if the entire symbol matches.
If instead you want to execute your commands when the script is running on any ZW contract then you need to manipulate the symbol string as required using the methods of the String Object.
Enclosed below are a couple of images illustrating two ways of doing this using either the split() or substr() methods.
In addition to the article at the link I provided above you may also want to review this article of the Core JavaScript Guide which is also included in the EFS KnowledgeBase
Alex

Originally posted by DK_trader
Im trying to create an indicator that will show the daily up/down movement limits for grains products. I have got as far as the following. It marks the up/down limit for ZW/. I plan on adding this to my watchlist so only want it to return a number for ZW for now ( I hope to add all the grains to one indicator, but being a newbie the process is as important as the final result, so one step at a time).
MY first question is where and how can I add an if statement so that it will only return values for ZW?

Thanks in advance

function preMain() {
    setPriceStudy(true);
    setStudyTitle("CBOT-ZW Daily Limit Move");
    setCursorLabelName("PD-H", 0); // High Limit
    setCursorLabelName("PD-L", 1); // Low Limit

    setDefaultBarStyle(PS_SOLID, 0); // High Limit
    setDefaultBarStyle(PS_SOLID, 1); // Low Limit  

    setDefaultBarFgColor(Color.red, 0);    // High  
    setDefaultBarFgColor(Color.green, 1);    // Low   

    setDefaultBarThickness(4, 0); // High  
    setDefaultBarThickness(4, 1); // Low   

    setPlotType(PLOTTYPE_FLATLINES, 0);    // High  
    setPlotType(PLOTTYPE_FLATLINES, 1);    // Low   
}

var bInit = false;
var xHigh_Limit  = null;
var xLow_Limit   = null;

function main() {
     
    if(bInit == false){
        xHigh  = high(inv("D"));
        xLow   = low(inv("D"))  ;
        bInit = true;
    }
    
  
    var vHigh  = xHigh.getValue(-1) + 60;
    var vLow   = xLow.getValue(-1) - 60;
    if( vHigh == null || vLow == null)
    return;
    
    
    return new Array (vHigh,vLow);
}