• Cable has traded a 14.5 pip range thus far Friday; 1.35825-1.3597

• Those parameters are within Thursday's 1.3571-1.3602 range

• 1.3571 is low since August 19 (when USD fell on U.S. bond buyback gambit)

• Dollar may react to Jackson Hole speech from Warsh at 1400 GMT

• Three Fed officials issue inflation warnings at Jackson Hole

• 1.3548 and 1.3525 (August 19 low) are GBP/USD support levels under 1.3571

GBPUSD


(Robert Howard is a Reuters market analyst. The views expressed are his own)