• Dollar index struggling to overcome the 200-WMA at 102.15

• Sep's rise from 98.60 halted at 102.28 before drop to 102.05

• The euro is 58% of the dollar index

• Traders are betting euro drops and decline has become stretched

• Dollar index rise is stretched at peak 20-week Bollinger bands

• Another GBP/USD short squeeze is brewing

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USD index

(Jeremy Boulton is a Reuters market analyst. The views expressed are his own)