Variance - MetaTrader 4 Script | Forex Indicator Download - MT4/MT5 Resources - MetaTrader 5 Resources
Welford's method of calculating variance (published here: Variance - Welford's method ) uses a single-pass approach to the calculation, but still uses a loop.
This method avoids a loop after setting the initial value, which makes it faster and suitable for use in situations where speed is a must.
PS: If compared with Welford's method, there will be differences. This is because Welford's method uses sample correction and this method does not - the difference is small, if you are used to using built-in indicators that use any kind of standard deviation (except std, bollinger bands, etc.) then compare it to this, but if you calculate a large range of values (some values are very different from the standard sample values) then use Welford's method
Attachment download
📎 variance_6fastp.mq4 (7.42 KB)
Source: MQL5 #25691
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