Fibonacci retracements are a useful way to analyse price action. But it can be difficult to choose the levels to draw them from. This spreadsheet uses Fibonacci retracements in combination with the linear regression line. The linear regression is used to identify the trend and trades are entered on a retracement to Fibonacci levels.
In this model, you can set different Fibonacci levels to fit the strategy you are testing. This model uses EUR/USD historical data and it has been updated to include data from 2018.
See the spreadsheet in action in the video below.