In this chapter, we've explored how to use the EasyPlot library, which allows us to interface the popular plotting utility gnuplot from within Haskell. The stock market is a wealth of information, and there is a long history of attempting to predict the stock market using plots of stock prices. Plots should help us to answer questions about data. Plots can also help us to explore data in the search of questions, if we are simply investigating data for the sake of it.

Our next chapter will help us to validate our assumptions about data through testing. We are going to be exploring data through statistics and Haskell.