Charting is a technique used in analysis of support and resistance level. These are trading range in which the prices move for an extended period of time, saying that forces of demand and supply are deadlocked. When prices move out of the trading range, it signals that either supply or demand has started to get the upper hand. If prices move above the upper band of the
trading range, then demand is winning. If prices move below the lower band, then supply is winning.
When supports are break then it’s become a resistance and vice versa.