Do I need to attach the EMA indicator on a chart that has an EA that uses the EMA indicator?

[Austin John Villarico Salvador]

If I use an EA that uses MT4 standard indicators (such as EMA, RSI, etc), do I still need to attach those indicators on the chart or the EA could still run without it?

[Sahil Bagdi]

No

[Pak Hong Poon]

no need attach