I'm not sure which category this thread belongs in, but after you hear what I have to relate I think you will agree with me that it belongs here. Being a private sort, I have never revealed who I am or what I do. Let us simply say that I am an untenured assistant associate adjunct professor of electrical engineering at the Central University of North Texas. This far enough from the truth that you cannot identify me, but puts me into an accurate professional context so you may appreciate my creditials as a data analyst. The most peculiar thing happened Friday. The departmental secretary rang me in the lab and said "Dr. Doaks, you have a call from Chicago, a Mr. Goldengeldfarberstein, or something like that. He says he has a consulting job for you at whatever the going rate is for undistinguished podunk-U EE professors." Never one to miss an opportunity to make $10 an hour, of course I took the call. To make a long and dull story shorter if even duller, Mr. GGFS, as I like to call him, sent me an Excel file with three columns and 390 rows and said, in effect, "You come lowly recommended from the junior clerk intern of mine who fetches my coffee. He frequents some sleazy website called EffeteTrader or something or other and said you are infamous there. I can't tell you what this is, but see if it means anything to you. Tell me if there is any relation between variables A and B." Given Mr. GGFS's name, and the fact that he called from Chicago, and that he has an intern, I am thinking that he may be a moneymaker type. I did not just fall off the turnip truck! I know a bit about the world of finance! So I took the gig. The data plot is attached. I'll share with you what I find, since a bigshot like Mr. GGFS is unlikely to be lurking here and see it. I find it very peculiar that there ia a huge variation in B but very little in A over the sequence. Can anybody here give me an idea what it might be, if it fact it is financial data? I have some ideas for how to start, but it doesn't look promising to make anything of it.