Money Flow Index Indicator: How to use it in Day Trading

Understand Price and Volume, and how these can affect market, is important in trading

In the past few weeks, we have focused on a number of technical indicators (our review of how the Parabolic SAR and the directional movement index works).

In these articles, you have learned about how you can use these technical indicators successfully in the market.

This time, we will look at another indicator that has become relatively popular.

Nowadays, the Money Flow Index is one of the best indicators in the markets.

What is money flow index indicator?

Money flow index was created by Gene Quong and Avrum Soudak. You will find the indicator in all trading platforms like the MT4 and our PPro8.

The MFI is a leading indicator that uses price and volume to show whether the price is overbought or oversold.

The index is usually positive when the price is rising and negative when the price is falling.

The best way to think of the MFI is to consider the RSI, which we covered before. Basically, Gene and Avrum understood the importance of volume and how it affects the markets. They therefore added volume to the calculation of the MFI.

How to Calculate: MFI formula

The MFI is calculated using a very simple formula. As we have written before, you don’t need to know how these indicators are calculated.

While we have been in the trading business for many years and use these indicators often, we don’t know how most of them are calculated.

The MFI is calculated as follows:

  1. You calculate the Typical Price (TP). You do this by adding the high, low, and close prices and then dividing the total by three.
  2. After finding the typical price, you calculate the Raw Money Flow. You do this by multiplying the Typical Price with the volume.
  3. Calculate the Money Flow Ratio. You do this by dividing the period (often 14) positive money flow by the period negative money flow.

Finally, the MFI is calculated by using the following formula.

Money Flow Index = 100 – 100 / (1 + Money Flow ratio)

Money Flow Index vs RSI

The MFI is usually interpreted in a similar way to the RSI. The big difference between the two is that the MFI incorporates volume. Because of this, the MFI tends to act a bit differently with the RSI because volume leads prices.

How to Use the money flow index

A good way to use the money flow index is to identify the overbought and oversold levels. When the MFI is above 80, the price is said to be overbought. It is said to be oversold when it is below 20.

However, as we mentioned when talking about the RSI, it is not mandatory that a reversal will happen the overbought and oversold levels are reached.

The price may continue to move higher when it reaches the overbought level of 80. It may also continue to move lower when it moves to below 20. This happens when there is a very strong trend.

The chart below shows the MFI in action on the Apple stock.

MFI on Apple Stock

MFI on Apple Stock

Strategies for your Day Trading

As you can see, while the MFI is a good indicator, it can also show you the wrong signals. This simply means that it can decline when the price is rising.

This happens when there are divergencies.

A good way to avoid these situations is to combine a number of technical indicators and other analysis tools such as the RSI and Fibonacci Retracement.

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