Plot daily data of a stock

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I'm a little unsure where to ask this question but hope I got it right! If not, please correct me.

I am doing a lab in R Markdown (in school) where I have downloaded the historical (daily) values of the prices of one stock for a period that covers ten years, and then I am going to plot the daily data of the stock.

My question is what daily data of a stock is? Since the csv-file with the historical values contains the values Date, Open, High, Low, Close, Adj Close och Volume I am a little unsure on what it is I should really plot - my spontaneous thought is the closing prices during this 10-year period. Is this correct?

Thanks in advance!

r-markdown stock
1 Answers

Usually stock price is referred Adj Close since it takes into account events like stock splits and dividends.

So basically, if you see line chart of stock prices, you usually see something like that under the hood:

plot(x = my_data$Date, y = my_data$`Adj Close`, type = 'l')

However, Open, High, Low, Close can be used to make visualizations with more accent on daily movements (in case of daily data). Check out candlestick charts abd OHLC charts. It can be achieved with quantmod or plotly packages for instance:

quantmod::chartSeries(my_data)

plotly::plot_ly(my_data, x = ~Date, , open = ~Open, close = ~Close, high = ~High, low = ~Low type="ohlc")
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