Calculates VWAP from a fixed point in time as well as standard deviations.
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リリースノート
Added options for multiple standard deviations and intervals (default is every 0.5 up to 4 σ)
Used some of the new pine 4 features to help with clarity (multiples make a bit of a spaghetti chart) and quickly setting up multiple AVWAPs. Labeling and bulk color changes etc.