I agree with trading off MAs as S/R (do it all the time!) and for getting a clear picture of the current trend, but I would hesitate to use them in crossovers as their lagging nature means you often miss, assuming you buy on the daily close when a crossover triggers an entry, a large portion of the move. The 10/20 day MA crossover does seemingly work half decently based on the chart, but is prone to whipsawing. The longer term MAs are less prone to that, but as mentioned, do miss a large chunk off the move. Of course, some of the move is better than none, but just my two-cents in this regards.