A moving average crossing is a common and widely adopted trading strategy. A short-term MA crossing above a long-term one provides the buy-signal. The opposite generates a sell-signal for the strategy.
Although very popular, this strategy has some limitations that lead to frequent "false signals" and only a few very profitable trades. If the strategy provides two many trades, that generates
the risk for more potential losses
more transaction fees paid
capital allocated to the strategy, thus the impossibility of catching other potential opportunities.
Applying an additional filter to the strategy, consisting of the crossing happening below a longer-term moving average, allows increasing the chances of catching the first crossing signaling a reversal.
The indicator is set to work with three moving averages.
Buy signal: The MA(9) to cross above the MA(50), which must be below the MA(100) Sell Signal: The MA(9) to cross below the MA(50)
This indicator works significantly better on lower time frames, where it can reduce the noise of getting too many non-profitable signals from a conventional crossing strategy.
The indicator has been backtested mostly on cryptocurrencies.