How Fibonacci retracement prices are calculated
The price range is swing high − swing low. In an uptrend, each level is the high minus the range multiplied by the retracement ratio. In a downtrend, each level is the low plus the same amount. If the low is 100 and the high is 160, the range is 60 and the 50% retracement is 130 in either direction.
The 50% level is widely plotted even though 50% is not a Fibonacci ratio. It remains in the calculator because it is a common midpoint reference used alongside 23.6%, 38.2%, 61.8% and 78.6%. The output keeps four decimal places so it remains useful for both higher-priced assets and forex quotes.
Choose swings before looking at the answer
A calculator removes arithmetic error, but it cannot decide which swing points matter. Select obvious extremes from the timeframe in your written plan. Changing the anchors until a level matches a desired entry is hindsight, not analysis. If different anchors produce different conclusions, record the ambiguity rather than presenting one line as certainty.
Treat levels as zones, not guarantees
Fibonacci levels are possible support or resistance references. They do not predict that price will reverse, and a touch is not a complete setup. Combine any level with market structure, liquidity, volatility and a defined invalidation point. Position size should come from the distance to that invalidation—not from confidence in the ratio.
Journal the setup so it can be tested
Tag every Fibonacci-based entry consistently, including direction, timeframe, chosen anchors and level. After enough trades, compare its win rate, average R and profit factor with your other setups. The useful question is not whether a ratio looks precise; it is whether your repeatable execution around that level has positive expectancy.
Run the risk/reward calculator before entry and review the sample with the win rate calculator. This educational calculator is not an entry signal or investment advice.