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The support is provided by the 38.2 percent Fibonacci projection level of a downward wave C, the third wave of a three-wave cycle from the June 8 high of $5.33-3/4.
This wave may have resumed, after the bounce from the July 20 low of $4.06-1/2 failed to extend above the 14.6 percent level at $4.34-1/2. Confirmation on the resumption of the wave C has been given by a break below the trendline falling from $5.33-3/4.
Resistance is at $4.23-3/4, the 23.6 percent level, a break above which could lead to a gain towards $4.34-1/2.