In MT4:
From the Top Menu, go to View and from the drop-down menu, click on Navigator. The keyboard shortcut key is (Ctrl + N)
Now you can see a list with all your Indicators and Expert Advisors on the left column.
You can choose the indicator you wish.
One way is by left-click of the mouse and dragging it to the chart
The first time you drag it to the chart it pops up a window where you can see on the top the following tabs:
About, Common, Inputs, Colors, Visualization
You can customize the indicator by clicking on the Input tab, and the Colors tab
I have attached 2 images as an example.