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Yes, the function does not consider cases when the price is flat. The solution is very simple. Look at the OBV2 function below. The series from OBV and OBV2 are highly correlated, but the strict definition would be higher (smaller) depending on the market evolution. In the QQQ case that difference is about 50% 1. You could find the maintainer here: ...


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Your source is not particularly clear about why what they're doing is a Z-score. To give some background, what they're doing is calculating $$\frac{R-\mu_{R}}{\sigma_{R}}$$ where R is the number of runs and the mean and standard deviation are of the number of runs. It's really more of a test statistic than a Z-score per se. The denominator in their formula ...


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In trading you need to make a lot of simple computation of a very large flow of data. FPGA are perfect that for. It is typically FPGA that will host marketfeed handler (see NOVASPARKS website, or ACCELLIZE) ; analytics computations ; risk computation (see ULLINK solution for instance). For more, this generic article is not that bad: Introducing ...



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