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Nick Goold

The DeMarker Indicator, developed by Tom DeMark, is a momentum oscillator that helps traders determine overbought and oversold conditions in the market. This guide will delve into the DeMarker Indicator, exploring its calculation, interpretation, and practical application in forex trading.

Understanding the DeMarker Indicator

The DeMarker Indicator assesses price movements' strength and identifies potential reversal points. It compares the current closing price to the previous high and low prices to determine whether the market is overbought or oversold. The DeMarker Indicator offers valuable insights into the market's momentum and potential trend reversals by quantifying the relationship between these price levels.

The formula for calculating the DeMarker Indicator is as follows:

Calculate the DeMax: DeMax represents the upward price movement or buying pressure. It is calculated by comparing the current high price (High) with the previous high price (Previous High). If the current high is higher than the previous high, DeMax is the difference between the two. Otherwise, DeMax is set to zero.
DeMax = High - Previous High (if High > Previous High) DeMax = 0 (if High <= Previous High)

Calculate the DeMin: DeMin represents the downward price movement or selling pressure. It is calculated by comparing the current low price (Low) with the previous low price (Previous Low). If the current low is lower than the previous low, DeMin is the difference between the two. Otherwise, DeMin is set to zero.
DeMin = Previous Low - Low (if Low > Previous Low) DeMin = 0 (if Low <= Previous Low)

Calculate the DeMarker: The DeMarker is the ratio of the smoothed DeMax and DeMin values. It is calculated by dividing the sum of smoothed DeMax values by the sum of smoothed DeMax and DeMin values. The smoothing is typically done using a moving average or an exponential moving average over a specified period (N).

DeMarker = SMA(DeMax, N) / (SMA(DeMax, N) + SMA(DeMin, N))


SMA represents the Simple Moving Average.

N represents the number of periods used for smoothing.
The resulting value of the DeMarker ranges from 0 to 1. Values closer to 0 indicate oversold conditions, while values closer to 1 indicate overbought conditions.

Interpreting the DeMarker Indicator

The DeMarker Indicator ranges from 0 to 1, where values closer to 0 indicate oversold conditions and values closer to 1 indicate overbought conditions. Here are some key points to consider when interpreting the DeMarker Indicator:

Overbought and Oversold Conditions: When the DeMarker Indicator rises above a certain threshold, typically 0.7, the market is overbought, indicating a potential reversal to the downside. Conversely, when the DeMarker Indicator falls below a certain threshold, typically 0.3, the market is oversold, indicating a possible reversal to the upside. Traders can use these thresholds as signals to enter or exit trades.

Divergence: Divergence occurs when the price and the DeMarker Indicator move in opposite directions. A bullish divergence occurs when the price forms lower lows, but the DeMarker Indicator forms higher lows. This may signal a potential bullish reversal. Conversely, a bearish divergence occurs when the price forms higher highs, but the DeMarker Indicator forms lower highs, indicating a possible bearish reversal. Traders can use divergence patterns to anticipate potential trend changes.

Confirmation with Other Indicators: To increase the accuracy of signals generated by the DeMarker Indicator, traders often use it with other technical indicators. For example, they might look for convergence or agreement between the DeMarker Indicator and oscillators such as the Relative Strength Index (RSI) or the Stochastic Oscillator. Confirming signals across multiple indicators can provide stronger indications of potential reversals or trend continuations.

Applying the DeMarker Indicator in Forex Trading

Now that we understand the calculation and interpretation of the DeMarker Indicator, let's explore its practical application in forex trading:

Identifying Overbought and Oversold Levels: The DeMarker Indicator can identify overbought and oversold levels in the market. When the indicator reaches extreme levels, such as above 0.7 for overbought or below 0.3 for oversold, it suggests that the price may be due for a reversal. Traders can consider entering trades in the opposite direction of the prevailing trend when these levels are reached, using additional confirmation from other technical indicators or price patterns.

Timing Entry and Exit Points: The DeMarker Indicator can assist in timing entry and exit points for trades. For example, when the indicator moves below the oversold level and starts to rise, it may signal a potential buying opportunity as the market could be reversing to the upside. Conversely, when the indicator moves above the overbought level and starts to decline, it may indicate a potential selling opportunity as the market could reverse to the downside. Traders can combine these signals with other technical analysis tools to fine-tune their entry and exit points.

Filtering Signals: To improve the accuracy of the DeMarker Indicator, it is vital to filter signals by considering the prevailing trend. In an uptrend, traders may focus on oversold conditions as potential buying opportunities, while in a downtrend, they may concentrate on overbought conditions as potential selling opportunities. By aligning signals with the prevailing trend, traders increase the probability of successful trades. Also, accounting for market news can prevent potential losses when the market trend is strong.

Risk Management: Trading a reversal strategy can lead to significant losses in trending markets, so setting a stop loss is vital. Analyzing support and resistance will help you place your stop losses above resistance when the market is overbought and below support when the market is oversold. Take-profit levels can be set when the market returns to 0.5 or lower when holding a sell position or higher when holding a buy position. Support and resistance are also beneficial when looking for take-profit levels.

The DeMarker Indicator offers valuable insights into overbought and oversold conditions, aiding traders in identifying potential reversals in the forex market. By understanding its calculation, interpretation, and practical application, traders can incorporate the DeMarker Indicator into their trading strategies.