Fernando Brochetto, thanks for the clarification.
Now I get your idea. It is about the off-time and following off-time columns.
We don't plan on adding new columns to the table yet, but I'll point out your need for a backlog.
It is possible that we will not add new columns at all, but will add functions to the calculator. For example, to solve your case, a function that allows you to subtract values from the current line the value of the previous line will help. We discussed such a feature in detail here. We plan that this function will work not only with numbers but also with time.
I will let you know when I have news.
Business Analyst, Wialon