Test out readme for new user of package

[ta-oliver]

Does the readme give enough guidance on topics like:

• how do I calculate trading rule recommendations?
• how do I calculate the performance of a trading strategy?
• how do I modify the parameters that a trading strategy uses?

We could add a FAQ or boost existing sections if helpful.

[ta-oliver]

@asifnawaz24 - can you raise a PR for any minor clarifications that would be helpful.

[ta-oliver]

As needing to find out the required time series can be non-obvious, we could highlight the API method for getting the required input columns: