Expert opinion. Fibonacci levels are designed to determine the optimal place to search for different candlestick sets to open a trade.
Expert opinion. When using Fibonacci levels, measure a long enough trend to avoid having a lot of levels in a small area.
Expert opinion. If the price chart has passed the 38.2% mark, then you can open a trade for 50%. If the 50% was crossed - then for 61.8%. But if the price chart has crossed it as well, then the measured trend has changed its direction and opening the trade based on the trend would not be feasible.