Caterpillar has been both a leader in the upmove and as the DJIA's second highest priced component carries inordinate weight in the index, ~13 times the point move of BAC or AA for the same percentage move
The stock is trading at $112.20 Down 1.19(1.05%).
Lifted in toto from Slope of Hope:
Below is a Daily chart of CAT. Price made a new all-time high on February 24th. There are negative divergences on the MACD, Stochastics, and RSI indicators, volumes are declining, and Bollinger Bands are tightening.
One to watch, in particular, as related to emerging markets and BRIC countries, which are also trading under similar constraints at major resistance levels, as outlined in my post of February 27th.
Near-term support lies around a Fibonacci, channel, moving average, and price confluence level of 105.00ish.