Dr Alexander Elder developed the Elder Force Index (EFI). The EFI is a powerful tool that helps traders gauge the strength of price movements and identify potential entry and exit points in the market. The EFI is determined using the direction of price change, the extent of the price change, and the trading volume. Let us understand the applications of the Elder Force Index in stock market trading.
Understanding the Elder Force Index (EFI)
The Elder Force Index is a technical indicator that measures the buying and selling pressure behind price movements. It combines both price and volume data to provide a comprehensive view of market dynamics. The EFI operates on the idea that when prices move significantly, and trading volume is high, it indicates considerable buying or selling activity. In contrast, weak price movements with low volume suggest a lack of interest or indecision among market participants.
Calculation and Interpretation
The EFI is calculated by taking the difference between the current day’s close and the previous day’s close, multiplied by the volume. The resulting value is then added to a running total, forming a cumulative sum. Positive values indicate bullish pressure, while negative values indicate bearish pressure.
EFI components
The EFI Line represents the cumulative sum of buying and selling pressure. Traders look for divergences between the EFI line and the price chart, which can signal potential reversals or trend continuation.
The zero line on the EFI chart serves as a reference point. When the EFI line crosses above the zero line, it suggests increasing bullish momentum. Conversely, crossing below the zero line indicates increasing bearish momentum.
The EFI histogram visualizes the difference between the EFI and zero lines. Positive histogram bars indicate bullish pressure, while negative bars indicate bearish pressure. Traders watch for histogram divergences and patterns to identify potential trading opportunities.

Applications of the Elder Force Index
Trend Confirmation – Traders can use the EFI to confirm the strength of an existing trend. When the EFI line moves in the same direction as the price trend, it suggests a healthy and sustainable trend. Conversely, divergences between the EFI line and the price chart might indicate a weakening trend.
Reversal Signals – EFI divergences or extreme readings can be potential reversal signals. For example, if the price reaches a new high, but the EFI fails to confirm the strength, it could indicate a bearish reversal. Similarly, if the price makes a new low, but the EFI shows bullish pressure, it might signal a bullish reversal.
Entry and Exit Points – Traders can use the EFI to identify favourable entry and exit points. Bullish EFI crossovers above the zero line can be considered buy signals, while bearish crossovers below the zero line can be seen as sell signals. Additionally, traders may look for histogram patterns, such as divergences or specific shapes, to time their trades more effectively.
Summary
The Elder Force Index is a valuable technical indicator that provides insights into the strength of price movements in the stock market. By incorporating the EFI into their trading strategies, traders can enhance their decision-making process and improve their chances of success. However, like any indicator, the EFI could be more foolproof and should be used with other tools and analysis techniques. A solid understanding of the EFI and its applications can empower traders to make more informed and profitable trading decisions.
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