simplest answer to that question is NO — they should be of no bother !
EXCEPT, they can possibly create annoying drawdowns and the noon est reversal can create a VERY large drawdown that might trigger a stop loss or cause you to get out manually when you see it happening.
i teach about it so that you KNOW that it will happen and WHEN it happens so youre prepared, as MOST times the H1 chart trade does not finish until “overnite” so you may be holding thru a few drawdowns even when your trade is “perfect”.
others can benefit by holding the (lets say) LONG H1 trade and opening a counter SHORT trade to take advantage of the reversal — you could also close the LONG and just go SHORT, reopening the LONG later in the day, OR you could choose to scalp the movements of the reversal.
IT OPENS OPTIONS, and WHICH option you choose is based on how you trade, but being forewarned of the drawdown should keep you from being stopped out, and keep your original trade (and equity) INTACT !
MY particular method is to run with the trend direction until i get what i think will be a major reversal, and at that time i decide whether to take my profit on the one trade and then open a counter, to HOLD the one older trade, and open a NEW counter trade, or to scalp or whatever ---- my decisions are usually based more on “how i feel” at that moment than anything objective — if im lazy, i would prob HOLD the original trade and allow the drawdown, while opening a counter trade, setting a tp point and going off to make escargot !
but i have OPTIONS available, and somewhere in those options is a good choice, and ANY of the choices are good !
the reason for using the lower timeframes to see the moves is because lately we have WIDE candle moves ---- a price can drop tremendously in the range of one candle and still be within TREND (as long as it doesnt break major support levels) — if you look at a large candle, you dont really SEE the move as you will on the shorter timefraes !
thats why you need the one or 5 min to see it !
enjoy and trade well
mp