Random Entry Strategy

[tancwkev]

Hi,

I am totally new to EFS or any sort of Programming languages. I am trying to make a strategy for backtesting.
The idea is this:
Generate a random number 1 for Long and 0 for short
Draw text above Bar, "1" for long, "0" for short
Color Bar Green for Long and red for Short

I came up with the Script below but I do not know how to make it work. Anybody please help. Thanks. TCW

function preMain() {
setPriceStudy(true);
setStudyTitle("Random");
setCursorLabelName("Random");
setColorPriceBars(true);
setDefaultPriceBarColor(Color.black);
}

// Global Variables
var x = null;
var bInit = false;

function main() {

if(getCurrentBarIndex() == 0) return;
if (bInit == false) {
x = Math.floor(Math.random() * 2);
}
}

var rx = x.getValue(0);

if (rx = 0) {
drawTextRelative(0, high(0), rx, Color.red, null, Text.BOLD|Text.BOTTOM|Text.FRAME, null, 12);
}
if (rx = 1) {
drawTextRelative(0, high(0), rx, Color.lime, null, Text.BOLD|Text.BOTTOM|Text.FRAME, null, 12);

}

[waynecd]

You may find information at this, and this site useful.

Here is what you asked for as I understand it.

function preMain() {
 setPriceStudy(true);
 setStudyTitle("Random");
 setCursorLabelName("Random");
 setColorPriceBars(true);
 setDefaultPriceBarColor(Color.black);
 }

 // Global Variables
//var bInit = false;//not used

 function main() { 

 if(getCurrentBarIndex() == 0) return;
    var x = null; 
    //if (bInit == false) {//not used
    //    bInit=true;//this line is needed to stop execution after it runs once
   // }
    x = Math.floor(Math.random() * 2);//needs to execute on each tick, no need for it to be global since 
                                      //it is only used within main() scope and only the current value is needed
                                      //every iteration

    if (x == 0) {
        setPriceBarColor(Color.red,Color.black,true,false);
        drawTextRelative(0, high(0), x, Color.red, null, Text.BOLD|Text.BOTTOM|Text.FRAME, null, 12);
    }  else  
    if (x == 1) {
        setPriceBarColor(Color.green,Color.black,true,false);
       drawTextRelative(0, high(0), x, Color.lime, null, Text.BOLD|Text.BOTTOM|Text.FRAME, null, 12);
    }
} 

Wayne