Siwei
Create a MACD on your chart (right click->Basic Studies->MACD).
Then right click on the MACD indicator. The Edit Studies dialog box will open up showing the settings for the MACD.
Apply the settings as shown in the attached image.
Alex
If you mean overlay them yes it is possible to do so.
Follow this link and it will show you how to overlay studies on to each other. http://share.esignal.com/groupconten...dow&groupid=21
FYI each image has some text on top that explains the procedure.
If instead you want to stack the studies to save space then right click on any one of the indicators and select Stack Studies
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