A Fibonacci retracement tool draws horizontal lines at fixed percentages of a move you select. That is all it does. The lines mark where a pullback would sit at 23.6%, 38.2%, 50% and 61.8% of the prior advance or decline, and StockCharts describes them as alert zones rather than reversal points.
Nothing in the ratios makes price turn. What the levels give you is a short list of prices to watch, decided in advance, with confirmation still required before a trade.
What are Fibonacci retracements
Fibonacci retracements are horizontal lines that mark potential support and resistance at set fractions of a completed move.
The Fibonacci sequence
The sequence runs 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 and on. After the first two terms, each number is the sum of the two before it. Leonardo Pisano Bogollo, an Italian mathematician who lived from about 1170 to 1250, is credited with introducing it to the West.
The retracement percentages come from dividing one term by another at a fixed distance in the sequence.
Key Fibonacci ratios
| Ratio | Where it comes from | What it describes |
|---|---|---|
| 23.6% | A term divided by the term three places higher, such as 13/55 = 0.2363 | A shallow retracement |
| 38.2% | A term divided by the term two places higher, such as 21/55 = 0.3818 | A moderate retracement |
| 50% | Not a Fibonacci ratio. It comes from Dow Theory, which holds that the averages often retrace half of a prior move | The midpoint of the move |
| 61.8% | A term divided by the next term up, such as 34/55 = 0.6181. This is the inverse of the golden ratio, 1.618 | A deep retracement, called the golden retracement |
| 78.6% | The square root of 0.618, which is 0.786. It sits outside the four levels StockCharts' tool draws | Deeper than the four levels above |
The approximations tighten as the numbers grow: 21/34 = 0.6176, 34/55 = 0.6181, 55/89 = 0.6179.
StockCharts calls 61.8% and 38.2% the most popular levels, and treats the 38.2% to 61.8% band, with 50% in the middle, as the zone covering the most possibilities. That band is a place to start watching, not a level to trade blind.
How to draw Fibonacci retracements
For an uptrend, finding support
- Find the swing low that started the move
- Find the swing high that ended it
- Draw from the low to the high
- The levels appear below the high, as potential support
For a downtrend, finding resistance
- Find the swing high that started the decline
- Find the swing low that ended it
- Draw from the high to the low
- The levels appear above the low, as potential resistance
Drawing tips
- Anchor on a swing high and a swing low that stand out on the chart without measurement
- The move should be large enough that a 38.2% retracement is a meaningful distance
- A retracement drawn on a higher timeframe covers a longer move, so its levels sit further apart and get tested less often
- Skip choppy price action. There is no move to retrace
Trading with Fibonacci levels
Strategy 1: pullback entry at Fibonacci support
Setup:
- The security is in an uptrend
- Price pulls back from the recent high
- Watch the 38.2%, 50% and 61.8% levels for a bounce
Entry: wait for price to reach a level, look for a bullish candle such as a hammer or an engulfing pattern, and take the trade on that confirmation. StockCharts is explicit that the retracement alone is not a reversal; candlesticks, momentum indicators, volume or chart patterns supply the confirmation.
Stop loss: below the level, or below the 78.6% retracement.
Target: the previous high, or a Fibonacci extension.
A hypothetical example, with the arithmetic. A stock rallies from $80 to $100, so the move is $20.
- 38.2% retracement: 100 - 7.64 = $92.36
- 50% retracement: 100 - 10.00 = $90.00
- 61.8% retracement: 100 - 12.36 = $87.64
Price pulls back to $90 and forms a bullish engulfing candle. The entry is $91, the stop $86.50 below the 61.8% level, and the target $100 at the prior high.
That is $4.50 of risk against $9.00 of reward, or 2 to 1. At 2 to 1 the breakeven win rate is one in three: 9w = 4.5(1 - w) solves at w = 0.333. Everything above 33.3% is profit before costs, and everything below it is not.
Strategy 2: Fibonacci confluence zones
Concept: when levels drawn from two different moves land at the same price, you get one zone that two independent measurements point at rather than two separate lines.
How to find them:
- Draw retracements from more than one completed move
- Look for levels that cluster within a small price band
- Treat the cluster as the alert zone
A hypothetical example: the 50% retracement of one move sits at $45.00, and the 61.8% retracement of an earlier move sits at $45.50. The zone is $45.00 to $45.50.
Confluence narrows the area you watch. It does not remove the requirement for a candle, a volume reading or an indicator to confirm the turn.
Strategy 3: Fibonacci extensions
Purpose: project levels beyond the end of the original move, for use as targets.
The common extension levels, and where they come from:
- 127.2%: the square root of 1.618
- 161.8%: the golden ratio itself
- 200%: twice the move, not a Fibonacci ratio
- 261.8%: 1.618 squared, which is 2.618
How to use them: draw the retracement from the swing low to the swing high, read the extension levels above the high, and use them as target candidates. There is no ceiling here. A trend can run past 261.8%, so the highest level is a marker rather than a limit.
Combining Fibonacci with other tools
Fibonacci and moving averages
A Fibonacci level that coincides with a moving average gives you two reasons to watch one price:
- The 50% retracement sitting on the 50-period average
- The 38.2% retracement sitting on the 20-period average
Neither combination is a signal. Both narrow the watch list.
Fibonacci and support or resistance
A retracement level that lands on a horizontal level from earlier price history is the same idea, with the second input coming from the chart rather than a calculation. In StockCharts' example, a 38% retracement coincided with broken support that had turned into resistance, and that combination raised the alert.
Fibonacci and candlestick patterns
Confirmation from price action is what turns an alert zone into a trade. StockCharts shows a stock bottoming near the 62% retracement with a hammer on high volume, after a failed bounce at the 50% level. The failed attempt is part of the record: alert zones produce false starts.
Fibonacci and RSI
- RSI oversold at the 61.8% retracement: two readings of the same pullback, arriving together
- RSI overbought at a retracement in a downtrend: the mirror case
- RSI divergence at a level: the momentum warning and the price level land on the same bar
Which Fibonacci levels matter most
The 61.8% level, the golden retracement
The deepest of the four standard levels, and one of the two StockCharts names as most popular. A pullback this deep gives back most of the advance and still leaves the swing low intact.
The 38.2% level
A moderate retracement. Price gives back under half the move before turning, which is what a shallow pullback inside a running trend looks like.
The 50% level
Not a Fibonacci ratio at all. It comes from Dow Theory's observation that the averages often retrace half of a prior move, and it sits in the middle of the 38.2% to 61.8% band.
Fibonacci mistakes to avoid
Mistake 1: drawing on every move
Retracements on every small swing fill the chart with lines, and with enough lines every price is near one. Draw on the moves you can name.
Mistake 2: ignoring price action
Buying at a level because it is a level skips the confirmation step the tool requires. The level is the alert; the candle, the volume or the indicator is the trigger.
Mistake 3: wrong anchor points
Two traders anchoring on different swing points get different levels from the same chart. Use the extremes of the move you intend to trade.
Mistake 4: using too many levels
Four levels are already four prices. Working with 38.2%, 50% and 61.8% keeps the alert zone to one band.
Mistake 5: forcing Fibonacci onto a chart
If there is no clear advance or decline, there is nothing to retrace, and the tool returns lines with no meaning behind them.
Fibonacci quick reference
| Scenario | Levels | Reading |
|---|---|---|
| Shallow pullback in a running trend | 23.6%, 38.2% | The trend has given back little of the move |
| Moderate to deep pullback | 50%, 61.8% | Inside the band that covers the most cases |
| Pullback past the golden retracement | 78.6% | Most of the advance is gone, structure close to failing |
| Target projection | 127.2%, 161.8% | Levels beyond the prior high, for exits |
| Retracement exceeded | Below the swing low | The move being measured is over, so the drawing is stale |
Fibonacci in practice
Draw from swing points you can name, watch the 38.2% to 61.8% band, and wait for a candle, a volume reading or an indicator to confirm before entering. Use extensions for targets and treat them as candidates rather than exits.
Then find out which levels have paid for you. Build one strategy per level in Swingfolio, then assign each trade to the level it came from. The R-multiple distribution chart on the strategy screen shows the spread of results for each one: how many small losses, how many trades ran past 2R. That distribution answers more than a win rate does, because two levels can share a win rate and pay differently. Start the 30-day trial and draw the first retracement on a chart you already hold.