A stock is a small piece of a company that you can buy. The price of the stock goes up and down depending on how well the company is doing and what other people think the stock is worth. There are some numbers that help us understand how the stock price is moving. One of these numbers is called the "20-day moving average". It's like an average price of the stock over the past 20 days. If the stock price goes above this number, it means that people think the stock is doing well and the price might go up. Sunrun is a company that provides solar energy services. Its stock price has been going up recently and it just went above its 20-day moving average. This is a good sign for people who own the stock or want to buy it. Read from source...