Variance indicator by Mladen

From Mladen Rakic

The standard deviation is a measure of how much a dataset differs from its mean; it tells us how dispersed the data are. A dataset that’s pretty much clumped around a single point would have a small standard deviation, while a dataset that’s all over the map would have a large standard deviation.

Given a sample the standard deviation is defined as the square root of the variance

Here you can find a Welford’s method for computing (single pass method) that avoids errors in some cases (if the variance is small compared to the square of the mean, and computing the difference leads catastrophic cancellation where significant leading digits are eliminated, and the result has a large relative error)

berserkyjc wrote: Tue Sep 20, 2022 1:34 am Dear Mrtools

Could you please add a moving average into this Variance indicator?

This Variance is in a seperate sub window.
Pleae add an extra line (moving average) to the indicate. that'd make the Variance indicator has two lines.
I know this can be done within the MT4 terminal by hand. I'm trying to make EA by FXDREEMA. this function cann't be done unless Variance with a MA line of itself is in the same indicator.

thank you very much.

Added the ma of variance.