On Balance Volume (OBV) calculates buying and selling as a cumulative indicator that adds volume on up days and subtracts ...

"Granville's New Key to Stock Market Profits." Granville felt that volume was the driving force behind the markets, and designed OBV to project when major moves in the markets would occur.

And retail investors have been able to affect multiple spikes in the stock's price. This can be noticed by looking at on-balance volume (OBV), a technical indicator that expresses crowd sentiment.