Since I no longer have my original engine builder to use, I'm new to it as well.
If you go to the Omex website you will see it under Software:
"The DATA2000 software allows you to view the recorded parameters in bar charts, max and min values, scatter graphs and most usefully line graphs with multiple overlays and zooming functions. And if you are struggling to analyse the data yourself, the data file you have recorded can be emailed to Omex so we can see what is happening in your ECU."
In my case the graphs were all over the place, indicating an intermittent problem with a sensor. When they suggested checking the warm up sensor first, it was an easy task to disconnect that sensor and hear the engine resume to normal operation instantly.
That's pretty cool that Omex is offering to look at your data files, so DO IT!
http://omextechnology.co.uk/ecu-600.html