You heard it from people who make claims based on their greedy bigotry. These are graphs with technical analysis and are not 100% uptrend. It is a measure so that you can protect your investment.
If the price breaks below the support, sell because the boat is going to sink.
If the price breaks above the resistance barrier, then buy because it is going to take off towards the moon.
If the price breaks below the support, sell because the boat is going to sink.
If the price breaks above the resistance barrier, then buy because it is going to take off towards the moon.