## Definition

Created by Italian Leonardo Pisado, Fibonacci numbers are a numerical sequence where each subsequent term corresponds to the sum of the previous two. In this way the sequence composition is made as follows:

Starting with the numbers 0 and 1, the third component of the sequence is their sum, that is, 0 + 1 = 1

0, 1, 1, ....

The next number is the sum of: 1 + 1 = 2:

0, 1, 1, 2, .....

Following 1 + 2 = 3:

0, 1, 1, 2, 3,.....

Following, 2 + 3 = 5:

0, 1, 1, 2, 3, 5, .....

And so on, the series is composed as follows:

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610 .....

Fibonacci found that each sequence number is approximately 61.8% of the next.

(0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610,....)

55 / 89 = 0.61797 = 61.8%

144 / 233 = 0.61802 = 61.8%

233 / 377 = 0.61803 = 61.8%

Also noted that each number is approximately 38.2% of the value of 2 numbers ahead:

(0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610,....)

13 / 34 = 0.38235 = 38.2%

21 / 55 = 0.38181 = 38.2%

34 / 89 = 0.38202= 38.2%

## Golden Number

The gold number, 1.618, is considered a universal constant of nature's growth and evolution. It is widely observed in various areas such as architecture, art, and biology. The golden number, as it is also called, is found in Leonardo da Vinci's Mona Lisa, in the Parthenon, in the face, hands, legs and arms of the human body, even in the shell of a mollusk or in plants such as sunflower.  ## Financial Market

Fibonacci retracements are often used as part of the strategy for trend continuation trading. Traders observe a retraction occurring on the Fibonacci lines and in conjunction with other entry signals, make buy and sell trades in continuation of the initial trend.

Fibonacci levels are represented in horizontal lines and the main levels used are 38.2% and 61.8%. These horizontal lines are used to identify possible price reversal points. Another commonly applied level is 50%, which although not a Fibonacci level, is widely viewed as an important reversal level and is plotted on the chart along with the 38.2% and 61.8% lines.

Fibonacci lines are defined from the swings high and low. As a very popular tool, almost 100% of platforms offer the option of automatic retraction calculation.

In the example below we can see that the end lines were positioned at the maximum and minimum of upward movement. The 38.2%, 50% and 61.8% levels were automatically calculated by the platform. Once the levels are set, prices are expected to find support in one of the Fibonacci retracements. In the example below, the trades placed buy orders at the 61.8% level before the upward movement continued. The same goes for bearish movements, in which case the short entry applies to the retraction test as shown below. ## Strategy

Like any other strategy, the probability of success increases if combined with other methods of operation. An example is a confluence with supports and resistance. In the chart below, we can see that prices are on an uptrend due to rising peaks and valleys, the break-in resistance followed by the formation of support in 3112, strengthens the price reversal after the 61.8% retracement test and continuation of bullish movement. ### Trendline continuation

In the chart below, the trend line makes resistance for prices that are moving downwards. The 38.2% retracement combined with the Trendline test gave traders a sell signal before the bearish move continued. ### Trendline Breakout

We can use retractions in trend reversal movements. In the following example, prices came from a downtrend with a trend line acting as resistance to the downward peaks. After Trendline break, large volume was generated in the bullish movement. Fibonacci retractions signaled the 50% level test and in confluence with the Trendline that worked as a support. ### Extension

While retraction levels can be used as a market entry strategy, Fibonacci extensions can complement this strategy by offering traders profit targets based on the relation to the same Fibonacci numbers. Extensions consist of levels plotted beyond the default level of 100% and can be used to design areas that produce potential profit. In the example below, we observe the 50% retracement entry and the 161.8% trade exit. ## Conclusion

Fibonacci levels indicate high probability reversal points, and often offer good buying or selling possibilities. However, this powerful tool should not be used alone, always seek confluence with other indicators and signals to increase the chances of success. Remember that no strategy has 100% winning rate and it is essential to use risk management to succeed in this market.

This material is for general information purposes only and is not intended as (and should not be considered to be) financial, investment or other advice on which reliance should be placed. INFINOX is not authorized to provide investment advice. No opinion given in the material constitutes a recommendation by INFINOX or the author that any particular investment, security, transaction or investment strategy is suitable for any specific person.