Not a big deal for investors, but traders should watch this gap where the rectangle is. In this instance it's a .5% gap on the IWM 30m bars showing where price may travel through with very little resistance. If you're a trader this is very important to know.
Sometimes gaps are in plain sight such as this, but other times support and resistance zones can be "hidden" in the price action. This is where "Fixed Range Volume Profile" or VAP (Volume At Price) can really help you see through the data in a unique way surprisingly few people seem to use frequently. It doesn't always work well, just like any other indicator, but it's definitely worth having in your arsenal.