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On Balance Volume The idea behind the OBV indicator is that changes in the OBV will precede price changes. A rising volume can indicate the presence of smart money flowing into a security. Then once the public follows suit, the security's price will likewise rise. Like other indicators, the OBV indicator will take a direction.
A rising (bullish) OBV line indicates that the volume is heavier on up days. If the price is likewise rising, then the OBV can serve as a confirmation of the price uptrend. In such a case, the rising price is the result of an increased demand for the security, which is a requirement of a healthy uptrend. However, if prices are moving higher while the volume line is dropping, a negative divergence is present. This divergence suggests that the uptrend is not healthy and should be taken as a warning signal that the trend will not persist. The numerical value of OBV is not important, but rather the direction of the line. A user should concentrate on the OBV trend and its relationship with the security's price.
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