Introduction to Fibonacci Mathematics
Fibonacci mathematics can help traders to reveal the hidden proportionality of market behavior. Fibonacci extension analysis studies the extends of prime trends and countertrends in order to identify key reversal zones, or else levels where a trending market may lose momentum and reverse.
Calculating the Basic Ratios using the Fibonacci Sequence
The Fibonacci sequence of numbers begins as follows: 0, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233 and etc.
The above sequence can then be broken down into ratios. The Fibo ratios can be found by dividing the Fibonacci numbers into each other.
If we do the math by excluding the first numbers, we realize that:
 Every number is approximately 1.618 times the preceding number
 Every number is 0.618 of the number to the right of it
Note that 1.618 is the golden ratio, and its inverse is 0.618.
Key Ratios for Financial Trading
In financial trading, the key ratios are 0.236, 0.382, 0.618, 1.618, 2.618, and 4.236. Many traders also use 0.5, 1.0.
Table: Key Fibonacci ratios for Financial trading
0.236 
1.000 
0.382 
1.618 
0.500 
2.618 
0.618 
3.618 
0.786 
4.236 
Fibonacci Extensions
The Fibonacci sequence of numbers produces useful trading tools such as the Fibonacci retracement and the Fibonacci extensions.
Fibonacci extensions can identify the extent of prime trends and countertrends to spot potential price reversal zones. Let's start by calculating the Fibo extensions above 100.
Calculating Fibonacci Extensions above 100%
These are some basic calculations, as presented in the following table:
 A, the Fibonacci sequence
 A1, dividing each Fibonacci number by the prior number (1 position), and the ratio approaches 1.618
 A2, dividing each Fibonacci number by two places to the left (2 positions), and the ratio approaches 2.618
 A3, dividing each Fibonacci number by three places to the left (3 positions), and the ratio approaches 4.236
Table: Calculating all Fibonacci Ratios
A 
A1 
A2 
A3 
1 

2 
2.000 (2/1) 


3 
1.500 (3/2) 
3.000 (3/1) 

5 
1.667 (5/3) 
2.500 (5/2) 
5.000 (5/1) 
8 
1.600 (8/5) 
2.667 (8/3) 
4.000 (8/2) 
13 
1.625 (13/8) 
2.600 (13/5) 
4.333 (13/3) 
21 
1.615 
2.625 
4.200 
34 
1.619 
2.615 
4.250 
55 
1.618 
2.619 
4.231 
89 
1.618 
2.618 
4.238 
144 
1.618 
2.618 
4.235 
233 
1.618 
2.618 
4.236 
377 
1.618 
2.618 
4.236 
By adding 3.618 (2.618+1), the key Fibonacci extensions (above 100) are 161.8%, 261.8%, 361.8%, and 423.6%.
Usage
Extension levels are areas where the price is expected to reverse. The TrendBased Fibonacci Extensions (TBFEs) are drawn on any chart and work through the use of the Fibonacci ratios. In bull markets, the Fibonacci Extensions tool is particularly useful to determine strong resistance when the price of an asset is found at price discovery. However, you can apply the tool on a bearish market as well. The Fibonacci Extensions tool can be used for multiple purposes:
 Evaluating how far primary uptrends and downtrends can go.
 Creating useful targets for our orders (takeprofit and stoploss), especially when the price of an asset is found at price discovery.
 Analyzing price corrections and distinguishing between temporary price pullbacks and key trend reversals.
 Analyzing crowd behavior during extremely bullish market movements, when other TA tools fail.
How to Draw the Fibonacci Levels
Fibonacci Extensions are drawn by joining three (3) points, in contrast to the Fibonacci Retracement which has only (2) two points. The first thing is to spot a trend that will be used as a base.
To draw the TrendBased Fibonacci Extensions in a bullish trend, you need to click on three separate price levels: the start and the end of the prime trend, plus the end of the secondary end. In a bearish trend, the logic remains the same, but in reverse.
 Click1: Start by clicking on the beginning of the price movement
 Click2: Click on the point of completion of the price movement
 Click2: Click on the point of completion of the secondary trend (end of the retracement against that move)
In the following chart, the TrendBased Fibonacci Extension (TBFE) is applied on Ethereum/USD.
Image: TrendBased Fibonacci Extension Tool on Ethereum (TradingView)
Trading with Fibonacci Extensions
Fibonacci Extensions use the same logic as the Fibonacci Retracement. Both tools indicate levels of a potential trend reversal. The main difference is that Fibonacci extensions can analyze trends that extend beyond the base trend, and that means the price extends above the 100% level. That is a common situation for recently listed financial assets lacking historical trading data or for financial assets that move in price discovery after a significant fundamental shift.
Fibonacci extensions can signal entries when the price bounces from an extension level, or indicate takeprofit price levels:
 Use the Fibonacci extension levels like any other support and resistance levels.
 Trade in the direction of the trend when there is a breakout of a Fibonacci extension level. Take profits near the next extension level.
 Trade a trend reversal, after price bounces from an extension level.
 Create very useful takeprofit zones, close to Fibonacci extension levels. In addition, indicate price targets when the price of an asset is at price discovery.
 Enter a StopLoss order near the next Fibonacci extension level.
Key Takeaways
 Fibonacci Extensions apply the same logic as the Fibonacci Retracement, however, Fibonacci extensions can analyze trends that extend beyond the base trend, and that means the price extends above the 100% level.
 The key extensions above 100 are 161.8%, 261.8%, 361.8%, and 423.6%.
 In bullish trends, the Fibonacci Extensions tool is particularly useful to determine strong resistance when the price of an asset is found at price discovery.
 The TrendBased Fibonacci Extensions (TBFEs) are drawn on any chart and work through the use of the Fibonacci ratios.
 To draw the Fib Extensions, you need a trend and two swing points.
 Extension levels are price zones where the trend is likely to reverse.
 You can use the Fibonacci extensions as price targets. Profittaking can include various sell orders spread across different Fibonacci extensions.
 You can use multiple orders based on Fibonacci Extension levels, but you should remember that these levels indicate a zone of support/resistance, not exact points.
 False signals can always appear.
 Prefer to apply the Fibonacci Extensions tool in higher timeframes, and wait for an official closing price.
 Traders should use Fibonacci Extensions in combination with another indicator or a continuation/reversal pattern in a higher timeframe.
■ Introduction to Fibonacci Extensions
G.P. for TradingFibonacci.com (c)
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