This is an OBV (On Balance Volume) with two different moving averages on it plus a bollinger band set to OBV to find the squeeze and expansion points on OBV. As you many know, OBV is one of those indicators that can show you the volume and not only that but also the direction that volume is going.
Notas de Lançamento
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Added the ability to switch usage between OBV and VSA Systems, For the Signal type you can use one of the words : "OPEN", "CLOSE", "HIGH", "LOW", "HL2" The "HL2" will use highest and lowest points of the Volume and not the price, remember that. The VSA system is chosen as the default indicator for the volume because it will show more information on the volume by using candle stick patterns, the high, low, open and close values are for volume and not price.