In this article you will understand a few basic steps for how to import and clean data from an Excel or CSV file and use Python to visualize market data.

To begin, I’d like to point out two key points to remember when analyzing stocks and pulling information. The first you’ve probably heard before, which is that you’re only as good as the quality of the data. If the data you are pulling is easily accessible, you should assume that many other people are using the same information. Second, that 90% of your time will be spent cleaning and understanding how the rows and columns are formatted.

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