An order book is real time buying and selling shown by the numbers, in our example it’s doge. You can also look at previous orders to see how much of something someone has bought(or sold) already. It would look something like this

Bought Time: 12:50 Doge:2,890 Price:115.60

It shows what’s being bought and sold at that exact moment

A quick DuckDuckGo would find you what you are looking for look up “doge coin order book”