Honestly, I have not had the best success trading individual stocks on Nasdaq using charts. As you know the market is definitely manipulated. With many stocks it only takes one or maybe two market makers to completely control a trend. So with many stocks, no matter how good your charts look, you still never know when a market maker may decide to jump in a clobber your trend, and they can turn in minutes, even seconds. Now the QQQQ is not nearly so easily manipulated. The setup I showed you in May-June 05, by the time the MACD hit the zero line, you already had a LOT of inertia that had pushed it up to that point. So you have 3 possible scenarios - the trend will continue for a while, the trend will fizzle, or the trend will reverse and tank. Either of the first two are both reasonable liklihoods. But the likelihood of the price rapidly tanking at the crossover is possible of course, but the probability is really not very high. A fizzle is OK - most likely the price will move sideways for at least a little while. There is no shame in taking most if not all of your money off the table, and if the trend fizzles, the QQQQ usually, not always, but usually gives you more than enough time to get out safely. Or as in this case, the inertia keeps moving - you make money. Now, suppose the QQQQ was going up (it wasn't but ...) before Katrina hit and you were happily riding the upwards trend. I genuinely believe that the market response, or more accurately, the illogical upwards response, was the result of a concerted effort by all the big market makers to avert a sudden tank of an already modest down trend. So in this case, the market makers stepping in to try to create a "soft landing" actually would save the little guy - they propped up the price by buying up shares at least long enough for someone like me to not only get out, but maybe get out with a profit even. I think that trading the trends on the QQQQ tends to align you a lot more favorably with the actions taken by the market makers, as opposed to a lot of other Nasdaq stocks where the market makers sometimes step in and really run up a price, but also frequently step in and step all over the little guys.