What is the use of the barograph of Casio PRO TREK mountaineering table? What should I think?

Casio PRO TREK outdoor mountaineering watch is equipped with triple sensors, which can accurately measure azimuth, air pressure and altitude information to help users accurately perceive environmental changes. Air pressure is closely related to the weather, and general air pressure changes will cause corresponding weather changes. For example, the latest PRO TREK PRX-8000T is equipped with a brand-new third-generation triple sensor, which can measure the information of air pressure, temperature and altitude, and the measurement accuracy and speed have been greatly improved compared with the past. When measuring air pressure, it can be judged according to the air pressure curve displayed on the LCD screen of the watch. If the curve shows a downward trend, it means that the weather may get worse and there may be heavy rain. So you need to prepare in advance. If it shows an upward trend, it can be judged.