I don't think this is the only way to predict and analyze your future sales. There are so many details in our dais regarding each company that even a tiny point and change could tour the situation upside down. Sometimes in a reasonable and sometimes in a wrong way. I like to work with https://belkins.io/. They provide me with all the information I need to know and apply a different strategy each time. I also tried other platforms, but they haven't been as accurate as this one. You can have months when your sales might go down, but after every 3 months, you should see improvements each time if you do a month.