EMA tradingview to Gekko

[mark.sch]

Hello,
How to translate tradingview Pinscript :

Code:

a = ema(b, c)

To Js for Gekko in a strategy


I found this in documentation :

Code:

method.init = function() {
 var weight = 10;

 // add the indicator to the strategy
 this.addIndicator('myema', 'EMA', weight);
}

method.check = function() {
 // use indicator results
 var ema = this.indicators.myema.result;

 // do something with macdiff
}

do I have to write 

Code:

method.init = function() {
 var b = 10;
   var c = 10;

 // add the indicator to the strategy
 this.addIndicator('myema', 'EMA', b, c);
}

thanks for your help.

In Pinescript you have these params:

ema(source, length) → series


For calculation in gekko you only need one param, the source (candles) is supplied by the gekko core so you need only one param in gekko, the length.