There is no magic in moving averages but they can be used to form the basis of a simple trading strategy that works.
For some reason, Forex traders especially enjoy these types of strategies. You can develop many trading systems using averages but remember that complex trading strategies are not always best.
As I mentioned, the 3 EMA’s will have different lengths and they will be:


The 55 EMA will be considered the longer term trend direction indicator:
The 21 EMA is considered a medium term trend indicator:
The 9 period will be seen crossing over and under the 21 period more times than crossing the 55:
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Visual multi-timeframe trend indicator.
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