Moving averages play a very big role in our daily analysis, and we rely heavily on certain averages to locate low risk entry and exit points. For gauging momentum in the short-term, the 5 and 10-day moving averages work very well. For example, if a stock or ETF is above the 5-day MA, there is almost no good reason to sell, unless the price has made a 25-30% advance in a few days. The 10-day MA is also a very good moving average to help ride the trend with a bit more wiggle room. For trend traders, no stocks or ETFs should really be sold while they are above the 10-day MA after a strong breakout. For example, look at the difference between $USO and $FDN at the highs. $FDN held above the rising 10-day MA minus a little shakeout, which is a sign that the momentum from the breakout is still strong.