I am facing a problem i have different Excel files in which there is a lot of data. i want to find some common condition for all these file to get the specific data (e.g i circle some example in the graph). I also attach 3 excel file as an example. I want to find some condition according to current or volatge column in the excel file. there is 3 column time, voltage and current. you can use any columnn for finding the condition to get some specific data and discard the remaining data. waiting for your kind help.