This uses BE as an example of what I do when I calculate the Fibonacci retracements and extensions, which are used to measure corrections and future price targets.
Retracements
I start by finding the location of a correction. I define a correction as anything the closes below the 20 period moving average. The lowest point in that correction becomes the first...
Quick Video Tutorial on how to use the TradingView Fibonacci Extension tool to measure Risk to Reward and even manage trades.
Also how to combine the Fibonacci Retracement tool with Stochastics to measure pullbacks during a trend.