I think we should keep dependencies in requirements.txt, and we should read dependencies from requirements.txt instead of keep another copy in setup.py.

It would be nice to have some general developer documentation for potential contributors to help in cases such as #510, etc.

What are the best steps to take towards accomplishing this? Maybe something similar (albeit not all details needed) to the Pandas developer docs?

I've begun an implementation of this on my fork, basicall

In the README.MD the link to the 17. Stochastic RSI (StochRSI) is broken. The url it links to is: https://runkit.com/anandaravindan/stochasticrsi which gives a 404

Summary (include Python version)

https://addisonlynch.github.io/iexfinance/stable/configuration.html#output-formatting

Does not specify that json is a valid output format.

Thanks Allan Edwards for pointing this out.

Create a file named constants.py that includes all the static data that requires no file to be stored in order to improve efficiency when accessing static data. This file will have a collection of upper case named variables with static data such as filters or countries from investpy.search() function.

How to reproduce:

In [1]: import pyEX
In [2]: client = pyEX.client.Client()