Fibonacci Calculator Online Forex Trading Tools descriptions The presented Fibonacci calculator will help you to generate four basic Fibonacci retracement values - 23. 8% 38. 2% 50% & 61. 8%. All you need to do is to fill the current trend's highest & lowest values into the form below. Fibonacci retracement levels is a powerful Forex tool of a technical analysis. The main idea behind these levels is the support & resistance values for a currency pair trend at which the most important breaks or bounces can appear. It is recommended to set your stop-loss take-profit as well as stop & limit orders at these levels or around their values. This Fibonacci calculator will organize your currency trading experience & will allow you to be in the market full-time.