Looked very confusing to me a couple of weeks ago. I go out for a drive and when I get home I download the logging info from the last drive. I then open the viewing software to look at the data. Then I just add the logged data from a long list so I can see what was going on and under what conditions during the drive. I've added 3 graphs in the middle then added to these graphs the data I want to see. In this case, as I'm looking at fueling, the first thing I need to know is the lamda reading (how rich or lean it is), then throttle position, rpm, boost and a couple of others. So, if I see its too lean at 4000rpm with 25% throttle and no boost, I can go into the base fuel map and add a little more fuel. The lamda corrected fuel trace will tell me exactly what % to add. You have a massive list of parameters that are logged so it's really easy to see what was going on with everything from fueling, spark, oil pressure, cooling fan duty to knock, misfires, ect. Its a great tool and will be of great value, when I know how to use it properly. I'm still in the learning phase and its a steep curve.