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Nick Perry (Schaeffer's Investment Research) submits: A chart I found particularly interesting was the second-best performing ETF of the week, the PowerShares WilderHill Clean Energy (NYSEARCA:PBW) fund:

The fund was a strong performer earlier this year but has recently been stuck in consolidation. Earlier this month, the PBW bounced off its 50-day moving average and is back to challenge the top of this range. The group has struggled at this zone, so a breakout here may catch some off guard.

Source: Clean Energy ETF Gaining Momentum (ETF: PBW)