You don't always need a separate download; MT5 has a highly customizable built-in tool:
Drag the indicator from the list onto your desired chart. Using the Built-in Fibonacci Tool fibonacci retracement mt5 download
If you download a custom .ex5 or .mq5 file, follow these steps to install it: Go to File > Open Data Folder . You don't always need a separate download; MT5
Open the MQL5 folder, then the Indicators subfolder. fibonacci retracement mt5 download
Drag your downloaded Fibonacci file into the Indicators folder.
The official hub for MetaTrader 5 tools. Popular options include the Free Automatic Fibonacci MT5 and the Auto Fib Retracements indicator.