Whether upward or downward, a jumping gap denotes a sudden impact and makes the market rise or fall sharply on opening. It is unexpected, but gaps in the US stock market will normally be filled in 3 to 4 months’ time, but still a little unfilled. When filled, it means it has the power to proceed in the reverse direction.
So what to do when S&P is totally filled and NASDAQ half filled? It means to wait and buy at lower support, such as 150-SMA or 200-SMA.