it's interesting, but they lock it down - also notice that they restrict your time frame, i.e. you can't go back more than about 2006 even though @SP goes back many years, or try it on $INX even though it goes back to 1961 it forces the chart to only go back to about 2006 or so.   I suspect that it's lock either because it didn't work very well before that time frame, or they lock it down with and then later on offer a paid version that is less restrictive or something.  It also seems to work best on @SP, the large ES contract, and not so well on other things. Also seems to work best on the weekly vs the daily

    Sort of seems like a classic marketing tool:  Show an interesting indicator, then give a version of it way free - which generates publicity and traffic - then perhaps sell something later on as well

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