Exxon Mobil breaks support at its 30-day moving average, levels to watch The stock is currently below support at its 30-day moving average, last at $90.87. This was an important uptrend line support proxy. If price weakness continues in the shares, there is the potential for a bearish crossing of the 10-day and 30-day moving averages. In many technical trading systems, this would be a negative momentum sell signal. Support is currently at $90.