The following steps are used to install the MT4 tools onto your Metatrader 4 terminal.
Open up your Metatrader 4 terminal.
Under the File menu, select "Open Data folder..."
Windows explorer will open in the Metatrader 4 data folder, showing you sub-directories under the main level. Double click on "MQL4" to go up one more level.
Double click on "MQL4" to go up one more level and you will see a series of folders including "Indicators", "Scripts" and "Experts".
Copy the files received into the respective folder, depending on whether they are an indicator, script or expert advisor.
Close your Metatrader 4 terminal and then reopen again.
Open the navigator in the Metatrader 4 terminal (CTRL-N) and look under the respective section to see if the indicators, scripts or expert advisor can be seen.
Lastly, under the "Tools" menu, select "Options" to bring up various settings you can change for your Metatrader 4 terminal.
Under the Experts tab, ensure the checkbox labelled "Allow DLL imports" is ticked and click on OK.