MT4 Sign In Demo Account - Forex Sign In to Account
Once you begin your MT4 forex platform you will have to sign in to your MT4 demo account before beginning to practice on this MT4 demo trading account.
To Sign In to MT4 demo account, click on the File Menu then click Sign In as shown on the MT4 platform example below:

The following pop up appears

Sign In to Account - MT4 Sign In Authorization for Forex Demo Account
Specify your forex demo account sign in number and password, the trading server you can select using the down arrow - for demo account select - Demo Server. Tick the "save sign in information" and click sign in - Forex MT4 Sign In. This is referred to as authorization - MT4 Sign In Authorization, every time before trading you will have to perform authorization by signing in to your forex account - typing the forex account details - and the platform check if the sign in account details are correct through this process of MT4 Sign In Authorization.


