If you trade a market prone to session opening gaps, such as index futures, you will probably be familiar with your moving average spiking into empty space at the start of the day, a distance from the market.
Sometimes price action will even move to fill the gap and yet your average barely registers that reversal.
Large opening gaps can be so distortionary to price indicators that they can feel unfit for purpose. Of course, the logic is functioning correctly, but it functions best with contiguous data, not data sets that produce large outliers.