Open and close price

In a trading day, the price of a stock at the start of the section is called “Open”…the opening price….

The price at the end of the day, when the section closes, is called “Close”..,. the closing price.

You will also see Open and close prices over shorter periods of time…

…say you want to look at the variation in price every five minutes. The price at the start will be called Open…and the price at the end of the five minutes close. If you take the lowest and highest value during those five minutes, you can build was is called a candle, which we will describe next.

Figure 2.18: Open and close price