AECOM's 15-minute chart shows MACD Death Cross and KDJ Death Cross signals.

Based on the 15-minute chart for AECOM, a technical indicator has triggered a significant warning sign. The Moving Average Convergence Divergence (MACD) has crossed below the signal line, a phenomenon known as a Death Cross, while the Keltner Distribution Indicator (KDJ) has also crossed below the signal line, a Death Cross as well. These indicators suggest that the stock price has the potential to continue falling, with a shift in momentum towards the downside and a potential for further decreases.