It definitely is easier to get a 10dma for an individual stock than for a huge group of stocks. One must be careful, though, to not apply the same trading strategy to an individual stock that was designed for a large group of stocks. Also, I question the validity of any trading system -- particularly one that only uses ten-days of data -- during the heat and passion and volatility of earnings season, especially an earnings season which is a precursor to the dreaded and historical slow time for technology stocks.
The only real positive I saw in Friday's action is that it was at the beginning of a three-day weekend. That could be explained by traders (window shoppers) finally loosing patience, ex vi termini, and pushing the buy button. The negatives are that the volume was below average (while the sell-off volume has been above average), and virtually all the recovery on Friday was accomplished in about as fast a time as the sell-off on Thursday -- about one hour at the end of Thursday, and one hour at the beginning of Friday. The rest of the time on both days was pretty flat. Doesn't show a lot of conviction.
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