Forex GMMA (Guppy Multiple Moving Average) is a technical analysis tool used by forex traders to identify trends and potential trading opportunities in the foreign exchange market. It was developed by Daryl Guppy, an Australian trader, and is based on the concept of multiple moving averages.

The GMMA consists of two sets of moving averages: the short-term group and the long-term group. The short-term group typically consists of three moving averages, while the long-term group includes five moving averages. The moving averages in each group are calculated using different time periods.

The short-term moving averages in the GMMA are used to identify the behavior of short-term traders, while the long-term moving averages are used to gauge the behavior of long-term investors. The idea behind GMMA is that by observing the interaction between these two groups of moving averages, traders can gain insights into market trends and potential changes in market sentiment.

When the short-term moving averages cross above the long-term moving averages, it is considered a bullish signal, indicating a potential uptrend. Conversely, when the short-term moving averages cross below the long-term moving averages, it is seen as a bearish signal, suggesting a potential downtrend.

Forex traders often use the GMMA in conjunction with other technical analysis tools and indicators to confirm trading signals and make more informed trading decisions. It's important to note that like any technical analysis tool, the GMMA is not foolproof and should be used in conjunction with other forms of analysis and risk management strategies.