How do I sign up for data?

[antiseptic]

Now, I have a broker that only lets me view stocks, but I want USDX and forex for analysis purposes.  Does my broker need to open access to those symbols? Or can I sign up for a separate service?

Is it possible to use a local MySQL database?

I have Metatrader 5, w/ Win10

Thanks.

[Sergey Golubev]

Every broker is having their own set of symbols.
You can open demo accounts with many of them to see the symbols required:

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As the people are asking about "How to open account with MT5" and "How to add the broker to MT5" so I want to remind the following links:

MetaTrader 5 Help - Open an Account

MetaTrader 5 Android OS Help - Opening a Demo Account 

MetaTrader 5 iPhone/iPad Help - Connecting to an Account and Opening a Demo Account

[Miguel Angel Vico Alba]

antiseptic:

Now, I have a broker that only lets me view stocks, but I want USDX and forex for analysis purposes.  Does my broker need to open access to those symbols? Or can I sign up for a separate service?

Is it possible to use a local MySQL database?

I have Metatrader 5, w/ Win10

Thanks.

As an alternative you could make use of some indicator as this: https://www.mql5.com/en/code/242