Lockheed Martin Corporation (NYSE:LMT) is a leading defense and aerospace company. The stock has been one of the best performing equities over the past four years. Finally, LMT stock is pulling back over the past four trading sessions. The stock is now close to testing its 20-day moving average. Traders should note that this 20-day moving average is minor support so there is a good chance that the stock could move lower. The daily chart is signaling very solid support around the $305.00 level. This area is where the stock traded sideways in August before breaking out to new highs. Keep this level on the radar as LMT is scheduled to report earnings on October 24, 2017.