A custom indicator is a program that performs the function of a technical indicator. To develop a custom indicator, use the MetaEditor editor. The list of custom indicators can be viewed in the Navigator (Custom Indicators) window.

After you have downloaded the indicators from the online source, the next task is to run them in the MT4 terminal. Step by step, it looks like this: find and copy the MT4 custom indicator file on your computer. These are the MT4 indicators you downloaded, their icons look like an exclamation mark. Next, open the data folder → open the MQL4 file → open the indicators folder → paste the files → restart MetaTrader 4.

Once all the actions are completed, restart the trading terminal. To apply the indicators to the charts, you need to restart the MetaTrader4 platform, select the Navigator option in the menu and run the Custom Indicators function. In this tab, you will see the previously installed indicator. Double-click on the indicator, after which the "Indicator Properties" window will appear, click "OK".