Choosing the right correlation calculation has helped me in the past such as the Pearson correlation co-efficient shown here https://towardsdatascience.com/time

Choosing the right correlation calculation has helped me in the past such as the Pearson correlation co-efficient shown here https://towardsdatascience.com/time-series-and-correlations-with-stock-market-data-using-python-e66774e3a16f https://towardsdatascience.com/time-series-and-correlations-... There's another company that's partners with Morningstar offering a direct API to protect portfolios here https://vectorspacebio.science/finance https://vectorspacebio.science/finance Hope that helps!