Fibonacci Expansions formula

[Paolo Borsa]

Hi everyone, after hours lost on google to seek this formula, I ask you.

I need the formula to calculate Fibonacci expansion, but using 3 points: A (swing low), B (swing high), C (retracement). One present in MT4 to speak.

If calculating the extension only using 2 points, the result is different and is not in line with what expected my strategy.

can anyone help me?

[Damian Mateusz Dziadosz]

161.8% expansion==> C+((b-a)*1.618)

Uptrend fibonacci   Retracement + ((Swing high-Swing low)*expansion percentage/100) 

Downtrend fibonacci Retracement-((Swing high - swing low)*expansion percentage/100) 

[Paolo Borsa]

Damian Mateusz Dziadosz:

161.8% expansion==> C+((b-a)*1.618)

Uptrend fibonacci   Retracement + ((Swing high-Swing low)*expansion percentage/100) 

Downtrend fibonacci Retracement-((Swing high - swing low)*expansion percentage/100) 

Oh perfect! Many thanks.