Alibaba Group Holding Ltd.’s biggest jump since September to about $66 puts it in the sweet spot of four different levels watched by technical analysts. The stock is right middle of the Bollinger Bands that demarcate its usual trading range based on a 20-day moving average; just above the 23.6 percent Fibonacci line that can provide support or resistance; at the 
upper edge of a downward trend channel it’s been in since late last year; and near the midpoint between the first and second standard deviations from where it has traded since its 2014 launch.

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