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How does the RSI indicator differ from the Money Flow Index (MFI)?
RSI measures price momentum using only closing prices, while MFI incorporates volume for a more reliable, volume-weighted assessment of market strength.
Aug 03, 2025 at 04:57 pm

Understanding the Core Purpose of RSI and MFI
The Relative Strength Index (RSI) and the Money Flow Index (MFI) are both momentum oscillators used in technical analysis within the cryptocurrency market. Despite their similarities in function—identifying overbought and oversold conditions—they operate on different underlying principles. The RSI measures the speed and change of price movements using only closing prices over a specified period, typically 14 days. It compares the magnitude of recent gains to recent losses to determine momentum. In contrast, the MFI incorporates both price and volume data, making it a volume-weighted version of RSI. This means the MFI accounts for the "money" flowing in and out of an asset, giving it the nickname “volume-weighted RSI.”
Calculation Methodology: RSI vs MFI
The calculation behind RSI begins with identifying average gains and losses over a set period. First, the net price change for each day is recorded. Positive changes contribute to the average gain, while negative changes contribute to the average loss. These averages are smoothed using a moving average technique. The formula is:
RSI = 100 – (100 / (1 + RS)),
where RS = Average Gain / Average Loss.
For the MFI, the process is more complex. It starts by calculating the Typical Price for each period:
(High + Low + Close) / 3.
Then, Raw Money Flow is derived by multiplying the Typical Price by the trading volume. Next, periods are classified as positive or negative money flow based on whether the Typical Price rose or fell from the previous period. The Money Ratio is calculated as:
Positive Money Flow / Negative Money Flow.
Finally, MFI = 100 – (100 / (1 + Money Ratio)).
This integration of volume makes MFI more sensitive to the strength of price moves supported by trading activity.
Role of Volume in MFI and Its Absence in RSI
One of the most significant distinctions lies in the use of volume. The MFI explicitly includes trading volume in its calculation, which allows it to reflect the intensity of market participation behind price changes. For instance, a price surge accompanied by high volume will produce a stronger MFI signal than the same price move with low volume. This enables traders to assess whether a breakout or reversal is supported by strong market conviction. Conversely, the RSI does not consider volume at all. It reacts solely to price changes, which can sometimes result in false signals during low-volume periods, such as during weekend trading in crypto markets when liquidity is thin. Therefore, MFI is often viewed as a more reliable indicator in volatile or low-liquidity environments due to its volume-based filtering.
Interpreting Overbought and Oversold Levels
Both indicators use a scale from 0 to 100 and commonly apply thresholds at 70 and 30 to identify overbought and oversold conditions. When RSI crosses above 70, the asset may be overbought, suggesting a potential pullback. A drop below 30 indicates oversold conditions, possibly signaling a rebound. The same thresholds apply to MFI, but because MFI includes volume, readings near these levels carry additional context. For example, an MFI above 80 with declining volume might suggest weakening momentum despite the high reading, while RSI at 75 with no volume data could still imply strong bullish pressure. Traders often treat MFI divergences—such as price making new highs while MFI fails to surpass its previous high—as stronger warning signs than RSI divergences, due to the confirmation from volume.
Using RSI and MFI in Cryptocurrency Trading Strategies
In practical crypto trading, both tools can be applied to spot reversals or confirm trends. To use RSI, a trader might monitor a Bitcoin/USDT chart on a 4-hour timeframe. When RSI drops below 30, they could consider a long position, especially if it starts rising back above 30. Conversely, an RSI above 70 might prompt profit-taking or short entries. For MFI, the process involves more steps:
- Identify the Typical Price for each candle.
- Compute Raw Money Flow by multiplying Typical Price by volume.
- Classify each period as positive or negative flow based on price direction.
- Sum positive and negative flows over 14 periods.
- Calculate the Money Ratio and then the MFI value.
- Watch for MFI above 80 or below 20 for stronger signals.
- Confirm with price action: if price rises but MFI falls, consider a bearish divergence.
Many traders overlay both indicators on the same chart to cross-validate signals. For example, if RSI shows overbought and MFI confirms with a drop below 70, it strengthens the case for a reversal.
Limitations and Contextual Sensitivity
Despite their usefulness, both indicators have limitations. RSI can remain in overbought territory for extended periods during strong uptrends, especially in crypto markets prone to parabolic rallies. Relying solely on RSI might lead to premature shorting. MFI, while more robust due to volume integration, can be misleading in markets with inconsistent volume reporting, such as certain decentralized exchanges where volume may be inflated or inaccurate. Additionally, MFI cannot be calculated if volume data is missing, which occasionally happens with some altcoins on smaller exchanges. Both indicators perform best when combined with other tools like moving averages or support/resistance levels.
Frequently Asked Questions
Can MFI be used on cryptocurrencies with low trading volume?
Yes, but with caution. For low-volume cryptos, MFI may produce erratic readings because small trades can disproportionately affect the money flow calculation. It’s advisable to pair MFI with liquidity analysis or avoid using it on assets with inconsistent volume.
Is RSI more responsive than MFI?
Generally, RSI tends to react faster to price changes since it doesn’t wait for volume confirmation. This makes RSI more volatile and prone to whipsaws, while MFI may lag slightly but offers more reliable signals due to volume filtering.
How do I set up RSI and MFI on TradingView?
- Open a chart on TradingView.
- Click “Indicators” at the top.
- Search for “Relative Strength Index” and add it.
- Repeat for “Money Flow Index.”
- Adjust the period to 14 if needed.
- Position both indicators below the price chart for comparison.
Do RSI and MFI work the same way on all timeframes?
They function identically in calculation across timeframes, but their reliability varies. On shorter timeframes like 5-minute charts, both can generate frequent false signals due to noise. On daily or weekly charts, RSI and MFI tend to produce more meaningful overbought/oversold levels and divergences.
Disclaimer:info@kdj.com
The information provided is not trading advice. kdj.com does not assume any responsibility for any investments made based on the information provided in this article. Cryptocurrencies are highly volatile and it is highly recommended that you invest with caution after thorough research!
If you believe that the content used on this website infringes your copyright, please contact us immediately (info@kdj.com) and we will delete it promptly.
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