Why candle closes are important

This is an example of why candle closes are important when marking out a BOS which changed direction. Like here the low just got swept and went on to make another higher high. There is no real way to know if it is a BOS or a trap so it's best just wait and see if we get a candle close or in this case break the high. You could get a reaction on the lower timeframe but it could just be a reaction and not lead to anything.