FXstreet.com (San Francisco) - The US Dollar index has managed to break above an important resistance zone between 81.31/78, and, according to RBS: this zone is confluent with the 100-month moving average, the Ichimoku cloud, June’s low and the highs from Nov ’10 Dec ’10 and Jan ’11.

“The USD gets stronger in its index in the short/medium … before beginning to weaken again in Q4 of this year,” says RBS. “In keeping with the multi year trend look for this to begin to tire between 86.20 and 86.40 and begin to move lower again towards the cloud and the pivotal 81.44 level.”