What does it mean when the MFI Money Flow indicator falls below 80?

When Bitcoin's MFI drops below 80, it signals weakening bullish momentum—watch for bearish divergence, volume spikes, and resistance levels to confirm potential pullbacks.

Aug 13, 2025 at 12:21 am

Understanding the MFI Money Flow Indicator

The MFI (Money Flow Index) is a technical oscillator that combines price and volume to measure the strength and direction of money flowing in and out of an asset. It operates on a scale from 0 to 100, making it similar in appearance to the RSI (Relative Strength Index), but with the critical distinction of incorporating volume data. When analyzing cryptocurrency price movements, the MFI provides traders with insights into potential reversals or continuations based on buying and selling pressure. The formula for MFI involves calculating the typical price, money flow, and a ratio of positive to negative money flow over a specified period—usually 14 periods.

The MFI is considered overbought when it rises above 80, indicating strong buying pressure. Conversely, when the MFI falls below 80, it may signal a shift in momentum. This drop does not automatically mean the market is oversold or bearish, but rather that the intense buying pressure that pushed the MFI into overbought territory is weakening. Traders monitor this transition closely, especially when it occurs after a prolonged uptrend in a cryptocurrency like Bitcoin or Ethereum.

Significance of the MFI Dropping Below 80

When the MFI drops below 80, it typically indicates that the asset is exiting an overbought condition. In the context of cryptocurrency trading, this could suggest that the recent rally is losing steam. For instance, if Bitcoin’s price surged over several days with the MFI climbing into the 85–90 range, a subsequent fall below 80 may reflect diminishing enthusiasm among buyers. This does not guarantee a price reversal, but it serves as a cautionary signal.

This movement is particularly meaningful when confirmed by price action. For example, if the MFI falls below 80 while the price forms a lower high, it could indicate bearish divergence—a scenario where price makes new highs but momentum (as reflected by MFI) does not confirm them. Such divergence often precedes pullbacks or corrections in volatile markets like crypto, where sentiment can shift rapidly.

How to Interpret the MFI Signal in Crypto Trading

To properly interpret the MFI dropping below 80, traders should consider the broader market context. The following steps can be applied to assess the signal:

• Check the trend direction: If the cryptocurrency is in a strong uptrend, a drop below 80 may simply represent a pause rather than a reversal. Use moving averages or trendlines to confirm the prevailing trend.
• Look for volume confirmation: A drop in MFI accompanied by increasing volume on down days strengthens the signal, suggesting active selling.
• Compare with support/resistance levels: If the MFI falls below 80 near a known resistance level, the probability of a pullback increases.
• Monitor for divergence: As mentioned, bearish divergence (price up, MFI down) enhances the reliability of the signal.

These checks help traders avoid false signals, which are common in highly volatile crypto markets where pump-and-dump schemes or whale manipulation can distort indicators temporarily.

Practical Steps to Monitor MFI in Trading Platforms

To effectively use the MFI indicator, traders must know how to set it up and interpret it on popular trading platforms. Below are detailed steps for using MFI on TradingView, a widely used platform in the crypto community:

• Log in to your TradingView account and open a chart for the desired cryptocurrency (e.g., BTC/USDT).
• Click on the “Indicators” button located at the top of the chart.
• In the search bar, type “Money Flow Index” and select it from the results.
• The default settings usually show a 14-period MFI with overbought (80) and oversold (20) lines. Ensure these levels are visible.
• Observe the MFI line in the sub-window below the price chart. When it crosses below the 80 level, pay attention to concurrent price action.
• Enable alerts by clicking the “Alerts” button, setting a condition such as “MFI(14) crosses below 80”, and choosing your notification method.

This setup allows traders to react promptly when the MFI exits overbought territory. Some advanced users may adjust the period length (e.g., 10 or 20) to make the indicator more or less sensitive, depending on their trading style.

Common Misinterpretations and How to Avoid Them

A frequent mistake is assuming that MFI falling below 80 means an immediate sell signal. This is not always valid, especially in strong bullish trends where overbought conditions can persist. For example, during a major altcoin rally, the MFI may remain above 80 for several days before finally dipping below—yet the price continues to climb. Acting solely on the MFI drop could lead to premature exits.

Another pitfall is ignoring volume spikes. If the MFI drops below 80 on low volume, the signal is weaker. Conversely, a sharp decline in MFI on high volume suggests institutional or large trader activity, increasing the signal’s credibility. Additionally, traders should avoid using MFI in isolation. Combining it with tools like moving averages, MACD, or Bollinger Bands provides a more robust analysis framework.

Using MFI in Conjunction with Other Indicators

To increase accuracy, the MFI should be used alongside complementary indicators. For instance:

• Pair MFI with the Relative Strength Index (RSI) to compare volume-weighted momentum (MFI) against price-based momentum (RSI). Divergence in both can confirm trend weakness.
• Use volume profile to identify high-volume nodes where price might find support or resistance after the MFI drops below 80.
• Combine with candlestick patterns—such as bearish engulfing or shooting star—that form when MFI exits overbought levels.

These combinations help filter out noise and reduce false positives, especially in cryptocurrencies where price action can be erratic due to low liquidity or news-driven volatility.

Frequently Asked Questions

Can the MFI stay below 80 and still see price increases?
Yes. The MFI dropping below 80 only indicates reduced buying pressure, not necessarily a downtrend. Prices can continue rising on moderate momentum, especially in strong bullish markets.

Is an MFI below 80 more significant on higher timeframes?

Yes. On daily or weekly charts, an MFI drop below 80 carries more weight than on 5-minute or 15-minute charts, as it reflects sustained shifts in sentiment rather than short-term fluctuations.

Does the MFI work well for all cryptocurrencies?

It works best for assets with consistent trading volume. Low-cap altcoins with erratic volume may produce misleading MFI readings due to insufficient data integrity.

What should I do immediately when MFI falls below 80?

Do not act impulsively. Confirm the signal with price action, volume, and other indicators. Consider tightening stop-losses or taking partial profits if in a long position, but avoid full exits without additional confirmation.