Small cap stocks such as Ion Geophysical tend to develop more aggressive Stair-Step patterns based on lower overall institutional ownership. Following an initial flurry of buying (circled area) decoupling the demand lines (green lines) from the share price (black line), we find three major spikes (1 through 3) that combine to form an aggressive Stair-Step pattern. This bullish pattern indicates heavy institutional buying. In addition, a small positive divergence pattern is also visible at A.