When you buy a Snapdragon Systems indicator product on Trading Heroes you will be directed to a download link. The file that you download is a zip file. So for example if you’ve bought the Simple RSI Alert indicator the actual file that you will have downloaded will be called something like:
SDS RSI Simple Alerts.ex4.zip
So like any compressed file, the first thing you need to do is to unzip it. You can either simply double click on it in order to enter the zip file (it’s basically treated like a folder) where you will see the file SDS RSI Simple Alerts.ex4. Next right-click on it and select Copy. You can then paste it where ever is convenient for you.
Alternatively you can right-click on the zip file itself and select Extract all.. which will then prompt you for a folder name where you want to unzip to.
Once you have successfully unzipped your file you should be left with a file with the following name (using the RSI Simple Alert as an example):
SDS RSI Simple Alerts.ex4
Once you’ve got the .ex4 file extracted the you can follow the usual steps for installing any indicator in Metatrader 4. See this post here for details.