So many of these stocks trade huge volumes pre-market and after-hours, even overnight. If you change a chart to show trades outside of standard market hours the daily charts look totally different and usually the gaps disappear. I don't think gaps matter as much as some other people but I do use it as a price level to trade off when they are just about to close. With gap fills and price targets and all that stuff I am never greedy, starting to buy/sell before the "number" and always buying and selling in many orders over a range of prices. You are balancing the risk of trading 'too soon' with the risk that it turns and runs away from you, unfilled. I've developed my trading style over 25 years or so and it works for me but it's all about managing risk - risk of losing money, risk of missing the trade because you got too greedy on price, risk of being way early... on and on.