If you believe that Fibonacci fellow21 Sep 2021 14:35
I know it wasn't his theory but this looks like a 61.8% Fibonacci retracement. 15p to 36p yields a rise of 21p. 61.8% of that is 12.98p. So, the drop from 36p to 23.02p is a 61.8% Fibonacci retracement.
I believe this will fly again soon!