Every trade transaction has a buyer and a seller... IHUB convention on the TRADE tab is that all trades that occur at the ask price or closer to the ask than the bid be labelled a " buy "... trades that occur at the bid price or closer to the bid than the ask are labelled a " sell "... if the price point is exactly between the bid/ask, it is labelled a ?.... on the "TRADES' tab, click the "help" button next to the "Get Trades" button for an explanation...