Lehmann Brothers (LEH) remains under pressure, and certainly the short sellers appear to have the upper hand and may be able to force the stock back to the mid-March levels.

Amgen (AMGN) has been in a narrow range following its failed breakout pattern in March. The dynamics suggest that another attempt to break upwards could be imminent.

Digital River (DRIV) gapped up on the open and closed above the 200-day EMA on an uptick in volume but now has a clear line of chart resistance to overcome.

The chart for the exchange traded energy fund, IYE, which tracks the Dow Jones US Energy Index, is showing a pickup in volume that could reflect the bearish bet being made by some traders who are expecting a rolling top pattern to emerge.

Tellabs (TLAB) ran into overhead resistance as it approached its 50-day EMA, and a typical bearish pullback pattern seems to be ready to give way on the downside.

The chart for Amazon (AMZN) shows the development of a bullish pullback pattern which provides an opportunity on the long side.

The iShares fund for the biotech sector shows a clear failure pattern to break above overhead resistance. The drop below all three moving averages yesterday was also accompanied by an uptick in volume.

Precision Castparts (PCP) has a bullish flag pattern with the 200-day EMA likely to provide a support in the developing pullback phase.

Urban Outfitters (URBN) broke down technically on Friday and could be headed towards the 200-day EMA.

Microstrategy (MSTR) looks vulnerable as the definitive technical characteristics of a bear flag are in evidence.