BB 是一个做多候选标的，较理想的入场时机是在波动率带宽收窄之后，以便设置更紧的止损。
逐段跳播
曾经是加拿大骄傲的 Blackberry。Blackberry 已经回落到年初至今的 VWAP，也就是那条橙色的线，你可以看到沿着那条线有买家。而在这发生的同时，我们看到 20 日移动均线，也就是那条红线，已经走平并转为上行，50 日移动均线也在上行。
我们在这里看到成交量增加；有事情正在发生。看样子，他们刚刚公布了利润数据。
The once-proud pride of Canada, Blackberry. Blackberry has dropped back to the year-to-date VWAP, that orange line, and you can see that there are buyers along that line. And while that was happening, we saw that the 20-day moving average, the red line, has flattened and gone up, and the 50-day moving average is also going up.
We are seeing an increase in volume here; something is going on. They have just announced their profit figures, by the looks of it.
我对 Blackberry 的顾虑在于，我们在这里看到带宽不断扩大，如果情况稍微平静下来，那么我认为，尽管今天是周二，它可能会在本周周四或周五进一步上涨。或者，如果你想在这里买入，你最坏的绝对情形是跌破昨天的低点，因为那是一次相当彻底的洗盘。
但那是一次很大的百分比波动，所以我更希望看到带宽收窄，这样我就能在这样一个水平下方设置止损。所以 Blackberry 是做多方向，
My problem with Blackberry is that we are seeing an ever-increasing bandwidth here, and if things calm down a bit, then I think that, even though it is Tuesday today, it might rise further on Thursday or Friday of this week.
Or, if you want to buy here, your absolute worst-case scenario is to fall below yesterday's low, because that was quite a washout. But that was a large percentage movement, so I would prefer to see the bandwidth decrease, so that I can place a stop-loss somewhere below a level like this. So Blackberry is on the long side,
这个频道对 $BB 的历次判断
Brian Shannon 在这只股票上只有这一条判断。