Net change is displayed above the thermometer.
The thermometer represents the current market standing of the symbol as well as the symbol. The thermometer gives a graphic indicator of the current market standing relative to its opening, high and low prices. It shows the High to Last (Red), Low to Last (green), and Open (yellow triangle) for that symbol for the current day. The close or last price is indicated by the change of color from red to green. If the thermometer displays all yellow, the data is not available, and you cannot trade the symbol.