There is a hidden pivot support area at 30.80 which Caterpillar tried to reach Monday.  Below it, the next support areas are 26.65 and 26.42.  A rally attempt would encounter crucial resistance at 35.80, but above that number the next Hidden Pivot resistance lies at 40.63.   Most immediately, there are lesser impediments at 31.93 and 32.11  (IT)

Update: It appears that there should be some support for price at 30.20 and then 28.45.  For price to start a retracement higher it would ahve to go through 31.30.  Max Pain: 35