Not all sellers are for tax lossDue to the thin trading of the stock, any spike up or down of the price creates volatitity and the market makers have a mandate to moderate trading and reduce volatility to a minimum. So they buy or sell for their own accounts in order to keep some order in the market. So when the stock spikes up sharply with no volume, these guys step in and sell some stock in order to keep some order in the market. Hence not all sellers for tax loss.