Let's check out the charts of UAL this Wednesday morning.
In the daily bar chart of UAL, below, we can see that the shares traded lower probably in reaction to their wider-than-anticipated first-quarter loss the other day. Prices gapped below the cresting 50-day moving average. The rising 200-day moving average line is not far below the market in the $42 area.
The On-Balance-Volume has been weakening since the middle of March telling us of a shift from aggressive buying to aggressive selling. The Moving Average Convergence Divergence (MACD) oscillator also peaked in March and is now just above the zero line, poised for a possible outright sell signal.