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I agree with Brookleise, this stock is a bit ahead of itself. The gaps created about a month ago were filled today, but in doing so it created another gap, this time on the downside. Dell has a very good history of filling its gaps so I look for the stock to move down to Thursday's high at some point in the near future. I sold at the 71 gap yesterday and will buy back when the new gap is filled.
Basically, Bollinger bands assume the stock price tends to run between the higher band and lower band. If the price goes outside the range, it tends to come back to between the range. So if you apply this to DELL daily chart, in mid-July, late Aug., late Sep., and Nov. 9th or so, you can see the stock price was at or surpassed the upper band, and all these were followed by a pull back. As of today, the Dell price still sits outside the upper band. Of course, it will also depend on the broad market for the degree of the pull-back. For the demonstration purpose, here is a link to dell 6-month daily chart. BTW, I am just learning, so not at all know much about tech analysis. Maybe some others can explain more clear. bigcharts.com