EFS for Multiple Symbols

[mabtrader]

Hi,

I have heard that I can have up to 7 symbols be externally acessed by an EFS and be alerted on these 7, using the alert to list. I need some help with the code - Are there any examples of this that I could use as a starting point. I don't seem to be able to find any on the forums and the file sharing is almost impossible to find anything specific. Please Help.

Many thanks

[eSignal_JasonK]

Hello mabtrader,

To access the price or indicator data for symbols that are external to the chart symbol, you use the sym() function for the source. Any of the Series or Built-in study functions that have the optional ... [, Series | sym() | inv() ] ... or ... [, sym() | inv() ] ... parameter can accept sym(). You would pass the desired symbol to this function as a string.

For example, to access the close series for IBM, you could do the following.

var xClose = null;

function main() {
    if (xClose == null) xClose = close( sym("IBM") );

    // get current bar's close value for IBM close series
    var nC_IBM = xClose.getValue(0);
    if (nC_IBM == null) return; // validate data

    // use nC_IBM variable for conditional statements
    if ( /* enter your condition here */ ) {
        Alert.addToList("IBM", "My Alert Text", Color.black, Color.white);
    }


    return;
} 

Also, please see the Alert Functions reference material for the alert methods syntax.

[mabtrader]

Many thanks Jason.

It seems to work well for that one external symbol, but
I have another basic question.
How do I use more than 1 symbol in my code to get up to maximum of 7 external symbols ?

Thanks..

[eSignal_JasonK]

-

Hello mabtrader,

The example I gave you simply shows you how to access data for an external symbol using the sym() function. To incorporate additional symbols you just need to repeat the process using unique variables for the other symbols. Based on your reply, it appears that you are fairly new to programming. To help you get a jump start with EFS for your custom development needs, please visit the resources below my signature.