I thought I would use several and see which correlated but it has made things more confusing as non seem to correlate with the other and they are all all over the place. I am using rank tracker, rank checker, scroogle, seoserp and sescout. Rank tracker seems slow updating since I will update and it says 86 whereas scroogle says not in top 100. I guess overall they all give me result within ten places but that is quite a margin for error. Which would be the most accurate up to date? I have been using scroogle through the day for manual checks but I don't know if I should even trust that one now. Actually I think scroogle is pretty accurate (probably?) it's just I wanted one as accurate which would give me a graph. I guess it isn't much of an issue as the graphs are good just to give a ballpark while scroogle hones in.