Click on your App Store icon to enter the App Store
Type "Metatrader 4" in the search window. Appstore will find the Metatrader 4 app for you.
App Store will find the Metatrader app for you. Please note you need EXACTLY Metatrader 4, no other app.
As you can see, the software is absolutely free. Click the blue "free" button to begin the installation.
Click the green "Install app" button to install the app into your iPhone/iPad.
After installation, run the app. You will be asked to login with your existing account or open a new demo account.
Type "octafx" into the server search bar and, after the servers are found, select live or demo server (real- for real account, demo - for demo accounts).
Enter your MT4 login and password to login to your account
If you are doing everything right, you will be logged into your account. From here you can enjoy the Metatrader 4 trading app on your iPhone or iPad!