In MT4, when you switch your chart templates, you’ll lose any current analysis on your charts. To prevent this, you can leave your price charts open and just change the indicators that you use – this is where hotkeys come into play. You can assign a hotkey to place a certain indicator on your charts, instead of needing to change the template.
To assign a hotkey to an indicator, simply right-click on the indicator on the navigator window and select “Hotkey”.