One of the more interesting and noted aspects of support and resistance is the inability of price to move through round numbers such as $20 or $50. Of particular importance are the large round numbers such as $100 or $1,000. This phenomenon occurs because many inexperienced traders tend to buy when prices are at whole levels because they seem to think assets are most fairly valued when they reach these levels. Also, most stop and limit orders placed are at round numbers. It’s more likely to see a stop or limit order at $100 than at $100.06. With so many orders being placed at the same level, these levels come to act as strong price barriers.