注:根据老蛇的定义,Major Accumulation Day (MAD) = (UpVol / DnVol > 9), and Major Distribution Day (MDD) = (DnVol / UpVol > 9). In other words, it's called a MAD if in a day of trading >90% of trades closed on the Ask, and vice verso for MDD. 我的图中用的是 Total Volume (NYSE + AMEX + Nasdaq).