Fibonacci Retracement

Peter sees price retreat after a rise and wants to measure how much of the earlier move it has given back. Fidelity bases the tool on the difference between a selected high and low. These endpoints are called anchors. Peter records their prices and times, the market, and the Timeframe, meaning the duration of each candle. Someone else might measure a smaller move within the larger one on the same chart. Different lines need not mean bad arithmetic. Compare the anchors before comparing results. [1]

StockCharts traces the common 23.6%, 38.2%, and 61.8% levels to ratios in the Fibonacci sequence, where each new number is the sum of the preceding two. For chart reading, what matters is what the percentages measure: the portion of the chosen move that has been retraced. They compare price distances. They are neither the probability of buyers appearing at a line nor a strategy’s success rate. The marks’ mathematical origin does not prove that a market must obey them. [2]

Peter also finds 50% in the tool. StockCharts explains that this commonly added level does not come from Fibonacci ratios. It simply marks half of the preceding move. After a rise, that is half the distance gained, not half of bitcoin’s entire price. The line can provide a reference point, but sharing a tool name with the others does not give it the same mathematical origin. [2]

Fidelity uses the difference between the selected high and low. Call them High and Low, and let r be the retraced fraction. After a rise, the linear calculation is High − r × (High − Low): subtract part of the gain from the top. After a decline, the rebound goes upward, giving Low + r × (High − Low). The same fraction can therefore mark a different price. TradingView offers Reverse to invert the tool’s orientation. Peter checks the actual prices beside the lines rather than confusing label direction with the direction being measured. [1] [3]

TradingView has a separate option for calculating levels on a logarithmic scale. Equal spacing on a linear scale represents equal price differences; on a logarithmic scale it represents equal ratios. The calculation setting can therefore change the price levels, not just the picture. When sharing a chart, Peter includes anchors, orientation, and calculation method. Switching the chart’s appearance alone may not establish the tool’s setting. Without that information, two people can use the same name while measuring differently. [3]

TradingView Auto Fib Retracement selects anchors for the user. Deviation affects the price departure required from the previous pivot, a selected turning point; Depth affects the minimum number of candles considered. Peter no longer has to click each endpoint, but he still needs to know the selection rules. Changing them can change the anchors and every resulting line. Automation saves drawing work; it does not remove dependence on settings. [4]

StockCharts describes levels as areas to watch, not fixed reversal points. Peter observes what price actually does near a line. Touching it does not establish that orders are waiting there to halt a decline, or that his own order will fill. To turn this into a strategy, he needs to define confirmation and the conditions that invalidate his idea. An area of interest and a trading rule are different things. [2]

TradingView warns about lookahead bias, using information unavailable at the time, and overfitting, tailoring rules too closely to one stretch of history. For Peter, that means not choosing the perfect high after seeing the subsequent bounce. His test records when he could actually identify both endpoints and the settings available then. He adds entry, exit, fees, and slippage, the gap between expected and actual execution prices. He then tries the rules on other data. A neat historical fit alone does not establish a trading edge. [5]