In order to remove indicators in the app please click on any market, then click on the button under the chart on the right. Next you need to click on the "Layers" button at the bottom left and on the next screen you may see the enabled indicators and remove the necessary ones by clicking on "X" next to them.
On the web version please choose any market, click on the "Layers" button above the charts, choose and remove the necessary indicators by clicking on the bin button next to them.