From a technical perspective, Palo Alto Networks (PANW) is looking like an interesting pick, as it just reached a key level of support. PANW recently overtook the 20-day moving average, and this suggests a short-term bullish trend.The 20-day simple moving average is a popular trading tool. It provides a look back at a stock's price over a 20-day period, and is beneficial to short-term traders since it smooths out price fluctuations and provides more trend reversal signals than longer-term moving averages.Th ...