Displays (and alerts) abrupt changes in volume, by default it compares previous candle volume to the current one but average volume over custom look-back period can be specified. Simply adjust filter to the volume change (or average volume) required before visual indication and alert will fire.
The theory is that large changes in volume forecast the future movement; certainly combine this indicator with other tools to build a more sound trading plan.
Notes de version
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Added DEMA, TEMA and ZLEMA average types for volume analysis selection.