On-balance Volume - The Formula

The Formula


OBV = OBV_{prev} + \left\{ \begin{matrix}
volume & \mathrm{if}\ close > close_{prev} \\
0 & \mathrm{if}\ close = close_{prev} \\
-volume & \mathrm{if}\ close < close_{prev}
\end{matrix} \right.

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